Merge "Fix visibility change during entering PIP app transition" into tm-dev am: 7284a6a9 am: 900a3f9f am: 0007b4d1 am: 33afdc7c

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18309444



Change-Id: I5e51cda0f993465c12b2882a00b2fcb476d05978
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>