Don't move taskbar window when it resizes

Test: enter split screen, open folder or drag an app icon and ensure the
taskbar doesn't jump briefly to the top of the screen
Fixes: 199386357

Change-Id: I9a4787931a764db0bc036725a58984823a8d5467
diff --git a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
index 0d684a0..f986e4b 100644
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarActivityContext.java
@@ -162,6 +162,8 @@
         mWindowLayoutParams.setFitInsetsTypes(0);
         mWindowLayoutParams.softInputMode = WindowManager.LayoutParams.SOFT_INPUT_ADJUST_NOTHING;
         mWindowLayoutParams.layoutInDisplayCutoutMode = LAYOUT_IN_DISPLAY_CUTOUT_MODE_ALWAYS;
+        mWindowLayoutParams.privateFlags =
+                WindowManager.LayoutParams.PRIVATE_FLAG_NO_MOVE_ANIMATION;
 
         WindowManagerWrapper wmWrapper = WindowManagerWrapper.getInstance();
         wmWrapper.setProvidesInsetsTypes(