Merge "Fix how task stack listener closes overlays on task changes." into udc-dev am: 70da3e64

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



Change-Id: Ib9568e3fd331975c27889853bbf8137f39f874b9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>