diff --git a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
index c5d7c95..fb0cd17 100644
--- a/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
+++ b/quickstep/src/com/android/launcher3/BaseQuickstepLauncher.java
@@ -36,6 +36,7 @@
 
 import com.android.launcher3.LauncherState.ScaleAndTranslation;
 import com.android.launcher3.LauncherStateManager.StateHandler;
+import com.android.launcher3.accessibility.SystemActions;
 import com.android.launcher3.config.FeatureFlags;
 import com.android.launcher3.model.WellbeingModel;
 import com.android.launcher3.popup.SystemShortcut;
@@ -53,6 +54,7 @@
 import com.android.quickstep.util.RemoteFadeOutAnimationListener;
 import com.android.quickstep.util.ShelfPeekAnim;
 import com.android.quickstep.views.RecentsView;
+import com.android.systemui.shared.system.ActivityManagerWrapper;
 
 import java.util.stream.Stream;
 
@@ -62,6 +64,8 @@
 public abstract class BaseQuickstepLauncher extends Launcher
         implements NavigationModeChangeListener {
 
+    protected SystemActions mSystemActions;
+
     /**
      * Reusable command for applying the back button alpha on the background thread.
      */
@@ -74,6 +78,7 @@
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
+        mSystemActions = new SystemActions(this);
 
         SysUINavigationMode.Mode mode = SysUINavigationMode.INSTANCE.get(this)
                 .addModeChangeListener(this);
@@ -132,6 +137,12 @@
     }
 
     @Override
+    public void onActivityResult(int requestCode, int resultCode, Intent data) {
+        super.onActivityResult(requestCode, resultCode, data);
+        mSystemActions.onActivityResult(requestCode);
+    }
+
+    @Override
     public void onEnterAnimationComplete() {
         super.onEnterAnimationComplete();
         // After the transition to home, enable the high-res thumbnail loader if it wasn't enabled
@@ -148,6 +159,12 @@
     }
 
     @Override
+    protected void onUiChangedWhileSleeping() {
+        // Remove the snapshot because the content view may have obvious changes.
+        ActivityManagerWrapper.getInstance().invalidateHomeTaskSnapshot(this);
+    }
+
+    @Override
     public void startIntentSenderForResult(IntentSender intent, int requestCode,
             Intent fillInIntent, int flagsMask, int flagsValues, int extraFlags, Bundle options) {
         if (requestCode != -1) {
@@ -188,6 +205,15 @@
             // removes the task itself.
             startActivity(ProxyActivityStarter.getLaunchIntent(this, null));
         }
+
+        // Register all system actions once they are available
+        mSystemActions.register();
+    }
+
+    @Override
+    protected void onPause() {
+        super.onPause();
+        mSystemActions.unregister();
     }
 
     @Override
diff --git a/quickstep/src/com/android/launcher3/accessibility/SystemActions.java b/quickstep/src/com/android/launcher3/accessibility/SystemActions.java
new file mode 100644
index 0000000..669877f
--- /dev/null
+++ b/quickstep/src/com/android/launcher3/accessibility/SystemActions.java
@@ -0,0 +1,90 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.launcher3.accessibility;
+
+import static com.android.launcher3.LauncherState.ALL_APPS;
+import static com.android.launcher3.LauncherState.NORMAL;
+
+import android.app.PendingIntent;
+import android.app.RemoteAction;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.graphics.drawable.Icon;
+import android.view.accessibility.AccessibilityManager;
+import com.android.launcher3.Launcher;
+import com.android.launcher3.LauncherState;
+import com.android.launcher3.LauncherStateManager;
+import com.android.launcher3.R;
+
+/**
+ * Manages the launcher system actions presented to accessibility services.
+ */
+public class SystemActions {
+
+    /**
+     * System Action ID to show all apps.  This ID should follow the ones in
+     * com.android.systemui.accessibility.SystemActions.
+     */
+    private static final int SYSTEM_ACTION_ID_ALL_APPS = 100;
+
+    private Launcher mLauncher;
+    private AccessibilityManager mAccessibilityManager;
+    private RemoteAction mAllAppsAction;
+    private boolean mRegistered;
+
+    public SystemActions(Launcher launcher) {
+        mLauncher = launcher;
+        mAccessibilityManager = (AccessibilityManager) launcher.getSystemService(
+                Context.ACCESSIBILITY_SERVICE);
+        mAllAppsAction = new RemoteAction(
+                Icon.createWithResource(launcher, R.drawable.ic_apps),
+                launcher.getString(R.string.all_apps_label),
+                launcher.getString(R.string.all_apps_label),
+                launcher.createPendingResult(SYSTEM_ACTION_ID_ALL_APPS, new Intent(),
+                        0 /* flags */));
+    }
+
+    public void register() {
+        if (mRegistered) {
+            return;
+        }
+        mAccessibilityManager.registerSystemAction(mAllAppsAction, SYSTEM_ACTION_ID_ALL_APPS);
+        mRegistered = true;
+    }
+
+    public void unregister() {
+        if (!mRegistered) {
+            return;
+        }
+        mAccessibilityManager.unregisterSystemAction(SYSTEM_ACTION_ID_ALL_APPS);
+        mRegistered = false;
+    }
+
+    public void onActivityResult(int requestCode) {
+        if (requestCode == SYSTEM_ACTION_ID_ALL_APPS) {
+            showAllApps();
+        }
+    }
+
+    private void showAllApps() {
+        LauncherStateManager stateManager = mLauncher.getStateManager();
+        stateManager.goToState(NORMAL);
+        stateManager.goToState(ALL_APPS);
+    }
+}
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 7c85bb7..20ebc7a 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -833,6 +833,7 @@
                         ON_ACTIVITY_RESULT_ANIMATION_DELAY, false);
             }
         }
+
         mDragLayer.clearAnimatedView();
     }
 
@@ -923,6 +924,9 @@
 
     @Override
     protected void onStop() {
+        final boolean wasActive = isUserActive();
+        final LauncherState origState = getStateManager().getState();
+        final int origDragLayerChildCount = mDragLayer.getChildCount();
         super.onStop();
 
         if (mDeferOverlayCallbacks) {
@@ -940,6 +944,20 @@
 
         // Workaround for b/78520668, explicitly trim memory once UI is hidden
         onTrimMemory(TRIM_MEMORY_UI_HIDDEN);
+
+        if (wasActive) {
+            // The expected condition is that this activity is stopped because the device goes to
+            // sleep and the UI may have noticeable changes.
+            mDragLayer.post(() -> {
+                if ((!getStateManager().isInStableState(origState)
+                        // The drag layer may be animating (e.g. dismissing QSB).
+                        || mDragLayer.getAlpha() < 1
+                        // Maybe an ArrowPopup is closed.
+                        || mDragLayer.getChildCount() != origDragLayerChildCount)) {
+                    onUiChangedWhileSleeping();
+                }
+            });
+        }
     }
 
     @Override
@@ -1335,11 +1353,16 @@
             // Reset AllApps to its initial state only if we are not in the middle of
             // processing a multi-step drop
             if (mPendingRequestArgs == null) {
+                if (!isInState(NORMAL)) {
+                    onUiChangedWhileSleeping();
+                }
                 mStateManager.goToState(NORMAL);
             }
         }
     };
 
+    protected void onUiChangedWhileSleeping() { }
+
     private void updateNotificationDots(Predicate<PackageUserKey> updatedDots) {
         mWorkspace.updateNotificationDots(updatedDots);
         mAppsView.getAppsStore().updateNotificationDots(updatedDots);
diff --git a/src/com/android/launcher3/LauncherStateManager.java b/src/com/android/launcher3/LauncherStateManager.java
index 195e69b..9f25729 100644
--- a/src/com/android/launcher3/LauncherStateManager.java
+++ b/src/com/android/launcher3/LauncherStateManager.java
@@ -164,6 +164,15 @@
     }
 
     /**
+     * @return {@code true} if the state matches the current state and there is no active
+     *         transition to different state.
+     */
+    public boolean isInStableState(LauncherState state) {
+        return mState == state && mCurrentStableState == state
+                && (mConfig.mTargetState == null || mConfig.mTargetState == state);
+    }
+
+    /**
      * @see #goToState(LauncherState, boolean, Runnable)
      */
     public void goToState(LauncherState state) {
diff --git a/src/com/android/launcher3/config/FeatureFlags.java b/src/com/android/launcher3/config/FeatureFlags.java
index b689a0a..aab6671 100644
--- a/src/com/android/launcher3/config/FeatureFlags.java
+++ b/src/com/android/launcher3/config/FeatureFlags.java
@@ -143,6 +143,11 @@
             "ENABLE_LSQ_VELOCITY_PROVIDER", false,
             "Use Least Square algorithm for motion pause detection.");
 
+    public static final BooleanFlag ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS =
+            getDebugFlag(
+            "ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS", false,
+            "Always use hardware optimization for folder animations.");
+
     public static void initialize(Context context) {
         synchronized (sDebugFlags) {
             for (DebugFlag flag : sDebugFlags) {
diff --git a/src/com/android/launcher3/folder/Folder.java b/src/com/android/launcher3/folder/Folder.java
index e33d89f..69f93de 100644
--- a/src/com/android/launcher3/folder/Folder.java
+++ b/src/com/android/launcher3/folder/Folder.java
@@ -26,6 +26,7 @@
 import static com.android.launcher3.LauncherSettings.Favorites.CONTAINER_HOTSEAT;
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.compat.AccessibilityManagerCompat.sendCustomAccessibilityEvent;
+import static com.android.launcher3.config.FeatureFlags.ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS;
 import static com.android.launcher3.userevent.LauncherLogProto.Target.FromFolderLabelState.FROM_CUSTOM;
 import static com.android.launcher3.userevent.LauncherLogProto.Target.FromFolderLabelState.FROM_EMPTY;
 import static com.android.launcher3.userevent.LauncherLogProto.Target.FromFolderLabelState.FROM_FOLDER_LABEL_STATE_UNSPECIFIED;
@@ -546,6 +547,8 @@
     }
 
     private boolean shouldUseHardwareLayerForAnimation(CellLayout currentCellLayout) {
+        if (ALWAYS_USE_HARDWARE_OPTIMIZATION_FOR_FOLDER_ANIMATIONS.get()) return true;
+
         int folderCount = 0;
         final ShortcutAndWidgetContainer container = currentCellLayout.getShortcutsAndWidgets();
         for (int i = container.getChildCount() - 1; i >= 0; --i) {