diff --git a/protos/launcher_log.proto b/protos/launcher_log.proto
index d08d851..0fe5310 100644
--- a/protos/launcher_log.proto
+++ b/protos/launcher_log.proto
@@ -155,6 +155,7 @@
   OVERVIEW_ACTIONS_SCREENSHOT_BUTTON = 25;
   OVERVIEW_ACTIONS_SELECT_BUTTON = 26;
   SELECT_MODE_CLOSE_BUTTON = 27;
+  SELECT_MODE_ITEM = 28;
 }
 
 enum TipType {
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskOverlayFactory.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskOverlayFactory.java
index eb3b190..33d9d9a 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskOverlayFactory.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TaskOverlayFactory.java
@@ -31,6 +31,7 @@
 import com.android.launcher3.util.ResourceBasedOverride;
 import com.android.quickstep.views.TaskThumbnailView;
 import com.android.quickstep.views.TaskView;
+import com.android.systemui.plugins.OverscrollPlugin;
 import com.android.systemui.shared.recents.model.Task;
 import com.android.systemui.shared.recents.model.ThumbnailData;
 
@@ -67,6 +68,13 @@
     public static final MainThreadInitializedObject<TaskOverlayFactory> INSTANCE =
             forOverride(TaskOverlayFactory.class, R.string.task_overlay_factory_class);
 
+    /**
+     * @return a launcher-provided OverscrollPlugin if available, otherwise null
+     */
+    public OverscrollPlugin getLocalOverscrollPlugin() {
+        return null;
+    }
+
     public TaskOverlay createOverlay(TaskThumbnailView thumbnailView) {
         return new TaskOverlay();
     }
diff --git a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
index ffa17ce..4598cdf 100644
--- a/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
+++ b/quickstep/recents_ui_overrides/src/com/android/quickstep/TouchInteractionService.java
@@ -508,12 +508,25 @@
                 base = new AssistantInputConsumer(this, newGestureState, base, mInputMonitorCompat);
             }
 
-            if (FeatureFlags.ENABLE_QUICK_CAPTURE_GESTURE.get()
-                    && (mOverscrollPlugin != null)
-                    && mOverscrollPlugin.isActive()) {
-                // Put the overscroll gesture as higher priority than the Assistant or base gestures
-                base = new OverscrollInputConsumer(this, newGestureState, base, mInputMonitorCompat,
-                        mOverscrollPlugin);
+            if (FeatureFlags.ENABLE_QUICK_CAPTURE_GESTURE.get()) {
+                OverscrollPlugin plugin = null;
+                if (FeatureFlags.FORCE_LOCAL_OVERSCROLL_PLUGIN.get()) {
+                    TaskOverlayFactory factory =
+                            TaskOverlayFactory.INSTANCE.get(getApplicationContext());
+                    plugin = factory.getLocalOverscrollPlugin();  // may be null
+                }
+
+                // If not local plugin was forced, use the actual overscroll plugin if available.
+                if (plugin == null && mOverscrollPlugin != null && mOverscrollPlugin.isActive()) {
+                    plugin = mOverscrollPlugin;
+                }
+
+                if (plugin != null) {
+                    // Put the overscroll gesture as higher priority than the Assistant or base
+                    // gestures
+                    base = new OverscrollInputConsumer(this, newGestureState, base,
+                        mInputMonitorCompat, plugin);
+                }
             }
 
             if (mDeviceState.isScreenPinningActive()) {
diff --git a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
index 85ef4c6..866836e 100644
--- a/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
+++ b/quickstep/src/com/android/quickstep/OverviewComponentObserver.java
@@ -33,6 +33,7 @@
 import android.content.pm.ResolveInfo;
 import android.util.SparseIntArray;
 
+import com.android.launcher3.util.SimpleBroadcastReceiver;
 import com.android.systemui.shared.system.PackageManagerWrapper;
 
 import java.io.PrintWriter;
@@ -44,18 +45,11 @@
  * and provide callers the relevant classes.
  */
 public final class OverviewComponentObserver {
-    private final BroadcastReceiver mUserPreferenceChangeReceiver = new BroadcastReceiver() {
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            updateOverviewTargets();
-        }
-    };
-    private final BroadcastReceiver mOtherHomeAppUpdateReceiver = new BroadcastReceiver() {
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            updateOverviewTargets();
-        }
-    };
+    private final BroadcastReceiver mUserPreferenceChangeReceiver =
+            new SimpleBroadcastReceiver(this::updateOverviewTargets);
+    private final BroadcastReceiver mOtherHomeAppUpdateReceiver =
+            new SimpleBroadcastReceiver(this::updateOverviewTargets);
+
     private final Context mContext;
     private final RecentsAnimationDeviceState mDeviceState;
     private final Intent mCurrentHomeIntent;
@@ -106,6 +100,10 @@
         }
     }
 
+    private void updateOverviewTargets(Intent unused) {
+        updateOverviewTargets();
+    }
+
     /**
      * Update overview intent and {@link BaseActivityInterface} based off the current launcher home
      * component.
@@ -131,11 +129,8 @@
             mOverviewIntent = mMyHomeIntent;
             mCurrentHomeIntent.setComponent(mMyHomeIntent.getComponent());
 
-            if (mUpdateRegisteredPackage != null) {
-                // Remove any update listener as we don't care about other packages.
-                mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);
-                mUpdateRegisteredPackage = null;
-            }
+            // Remove any update listener as we don't care about other packages.
+            unregisterOtherHomeAppUpdateReceiver();
         } else {
             // The default home app is a different launcher. Use the fallback Overview instead.
 
@@ -149,13 +144,9 @@
             // Listen for package updates of this app (and remove any previously attached
             // package listener).
             if (defaultHome == null) {
-                if (mUpdateRegisteredPackage != null) {
-                    mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);
-                }
+                unregisterOtherHomeAppUpdateReceiver();
             } else if (!defaultHome.getPackageName().equals(mUpdateRegisteredPackage)) {
-                if (mUpdateRegisteredPackage != null) {
-                    mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);
-                }
+                unregisterOtherHomeAppUpdateReceiver();
 
                 mUpdateRegisteredPackage = defaultHome.getPackageName();
                 mContext.registerReceiver(mOtherHomeAppUpdateReceiver, getPackageFilter(
@@ -170,7 +161,10 @@
      */
     public void onDestroy() {
         mContext.unregisterReceiver(mUserPreferenceChangeReceiver);
+        unregisterOtherHomeAppUpdateReceiver();
+    }
 
+    private void unregisterOtherHomeAppUpdateReceiver() {
         if (mUpdateRegisteredPackage != null) {
             mContext.unregisterReceiver(mOtherHomeAppUpdateReceiver);
             mUpdateRegisteredPackage = null;
diff --git a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
index 03d7c3e..75fcfe2 100644
--- a/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
+++ b/quickstep/tests/src/com/android/quickstep/TaplTestsQuickstep.java
@@ -17,8 +17,6 @@
 package com.android.quickstep;
 
 import static com.android.launcher3.ui.TaplTestsLauncher3.getAppPackageName;
-import static com.android.launcher3.util.rule.TestStabilityRule.LOCAL;
-import static com.android.launcher3.util.rule.TestStabilityRule.UNBUNDLED_POSTSUBMIT;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -41,7 +39,6 @@
 import com.android.launcher3.tapl.OverviewTask;
 import com.android.launcher3.tapl.TestHelpers;
 import com.android.launcher3.ui.TaplTestsLauncher3;
-import com.android.launcher3.util.rule.TestStabilityRule;
 import com.android.quickstep.NavigationModeSwitchRule.NavigationModeSwitch;
 import com.android.quickstep.views.RecentsView;
 
@@ -254,8 +251,6 @@
     @Test
     @NavigationModeSwitch
     @PortraitLandscape
-    // b/143285809 Remove @Stability on 02/27/20 if the test doesn't flake.
-    @TestStabilityRule.Stability(flavors = LOCAL | UNBUNDLED_POSTSUBMIT)
     public void testQuickSwitchFromApp() throws Exception {
         startTestActivity(2);
         startTestActivity(3);
diff --git a/src/com/android/launcher3/allapps/AllAppsContainerView.java b/src/com/android/launcher3/allapps/AllAppsContainerView.java
index fcccc59..afb7217 100644
--- a/src/com/android/launcher3/allapps/AllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/AllAppsContainerView.java
@@ -98,8 +98,8 @@
     protected boolean mUsingTabs;
     private boolean mSearchModeWhileUsingTabs = false;
 
-    private RecyclerViewFastScroller mTouchHandler;
-    private final Point mFastScrollerOffset = new Point();
+    protected RecyclerViewFastScroller mTouchHandler;
+    protected final Point mFastScrollerOffset = new Point();
 
     private final MultiValueAlpha mMultiValueAlpha;
 
@@ -238,6 +238,16 @@
 
     @Override
     public boolean onTouchEvent(MotionEvent ev) {
+        if (ev.getAction() == MotionEvent.ACTION_DOWN) {
+            AllAppsRecyclerView rv = getActiveRecyclerView();
+            if (rv != null && rv.getScrollbar().isHitInParent(ev.getX(), ev.getY(),
+                    mFastScrollerOffset)) {
+                mTouchHandler = rv.getScrollbar();
+            } else {
+                mTouchHandler = null;
+
+            }
+        }
         if (mTouchHandler != null) {
             mTouchHandler.handleTouchEvent(ev, mFastScrollerOffset);
             return true;
diff --git a/src/com/android/launcher3/allapps/LauncherAllAppsContainerView.java b/src/com/android/launcher3/allapps/LauncherAllAppsContainerView.java
index 25db0e7..f6766c4 100644
--- a/src/com/android/launcher3/allapps/LauncherAllAppsContainerView.java
+++ b/src/com/android/launcher3/allapps/LauncherAllAppsContainerView.java
@@ -51,7 +51,10 @@
     public boolean onInterceptTouchEvent(MotionEvent ev) {
         // The AllAppsContainerView houses the QSB and is hence visible from the Workspace
         // Overview states. We shouldn't intercept for the scrubber in these cases.
-        if (!mLauncher.isInState(LauncherState.ALL_APPS)) return false;
+        if (!mLauncher.isInState(LauncherState.ALL_APPS)) {
+            mTouchHandler = null;
+            return false;
+        }
 
         return super.onInterceptTouchEvent(ev);
     }
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index aab6671..ed28df0 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -106,6 +106,10 @@
     public static final BooleanFlag ENABLE_QUICK_CAPTURE_GESTURE = getDebugFlag(
             "ENABLE_QUICK_CAPTURE_GESTURE", true, "Swipe from right to left to quick capture");
 
+    public static final BooleanFlag FORCE_LOCAL_OVERSCROLL_PLUGIN = getDebugFlag(
+            "FORCE_LOCAL_OVERSCROLL_PLUGIN", false,
+            "Use a launcher-provided OverscrollPlugin if available");
+
     public static final BooleanFlag ASSISTANT_GIVES_LAUNCHER_FOCUS = getDebugFlag(
             "ASSISTANT_GIVES_LAUNCHER_FOCUS", false,
             "Allow Launcher to handle nav bar gestures while Assistant is running over it");
diff --git a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
index c6192bc..6a4b81f 100644
--- a/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
+++ b/tests/src/com/android/launcher3/ui/AbstractLauncherUiTest.java
@@ -34,6 +34,7 @@
 import android.content.pm.ActivityInfo;
 import android.content.pm.LauncherActivityInfo;
 import android.content.pm.LauncherApps;
+import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager;
 import android.os.Debug;
 import android.os.Process;
@@ -70,6 +71,7 @@
 import com.android.launcher3.util.rule.TestStabilityRule;
 
 import org.junit.After;
+import org.junit.Assert;
 import org.junit.Before;
 import org.junit.Rule;
 import org.junit.rules.RuleChain;
@@ -213,6 +215,21 @@
 
     @Before
     public void setUp() throws Exception {
+        final String launcherPackageName = mDevice.getLauncherPackageName();
+        try {
+            final Context context = InstrumentationRegistry.getContext();
+            final PackageManager pm = context.getPackageManager();
+            final PackageInfo launcherPackage = pm.getPackageInfo(launcherPackageName, 0);
+
+            if (!launcherPackage.versionName.equals("BuildFromAndroidStudio")) {
+                Assert.assertEquals("Launcher version doesn't match tests version",
+                        pm.getPackageInfo(context.getPackageName(), 0).getLongVersionCode(),
+                        launcherPackage.getLongVersionCode());
+            }
+        } catch (PackageManager.NameNotFoundException e) {
+            throw new RuntimeException(e);
+        }
+
         mLauncherPid = 0;
         // Disable app tracker
         AppLaunchTracker.INSTANCE.initializeForTesting(new AppLaunchTracker());