Fix black flash when splitting task

- Draw the thumbnail view and align with the thumbnail bounds instead of
  the whole task bounds with the icon
- Defer animating the task list until after the animation completes

Bug: 73118672
Test: Enter split screen
Change-Id: Ie10c079cb22ae82f3c5974296462abae335ef5a8

quickstep/src/com/android/launcher3/uioverrides/OverviewSwipeController.java

@@ -198,8 +198,8 @@ public class OverviewSwipeController extends AnimatorListenerAdapter
             }
         } else {
             if (goingUp) {
-                mPendingAnimation = mRecentsView
-                        .createTaskDismissAnimation(mTaskBeingDragged, maxDuration);
+                mPendingAnimation = mRecentsView.createTaskDismissAnimation(mTaskBeingDragged,
+                        true /* animateTaskView */, true /* removeTask */, maxDuration);
                 mCurrentAnimation = AnimatorPlaybackController
                         .wrap(mPendingAnimation.anim, maxDuration);
                 mEndDisplacement = -mTaskBeingDragged.getHeight();