Merge "Implement app icon overlay for entering PiP" into tm-qpr-dev am: bfcdd23597 am: 81628c047c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/21186942

Change-Id: Icc07c7e09db1bb495036f496281dc0e62e375042
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>