Merge "Fix how task stack listener closes overlays on task changes." into udc-dev am: 70da3e6452 am: 530d20de09

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23535652

Change-Id: I5ca9c72fb9974de2c91bab69be683ba743881276
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>