Merge "Wait for dismiss animation to finish before checking task count" into...

Merge "Wait for dismiss animation to finish before checking task count" into sc-v2-dev am: b0ef69e8 am: 26db5049

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/15312149

Change-Id: I7ee1650a1884c79aab63a42217a1cb18e2e563c7