Merge "Remove lingering content overlays in onTaskVanished" into tm-dev am:...

Merge "Remove lingering content overlays in onTaskVanished" into tm-dev am: 442dbd14 am: 8debce0d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18604863



Change-Id: I729a9d937c3c08c72f4a618cb8c22dbd9aa84b14
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>