Merge "Allow other app enter PiP when exiting current one" into tm-qpr-dev am:...

Merge "Allow other app enter PiP when exiting current one" into tm-qpr-dev am: 8df0cf45 am: 62a5b944

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/19484979



Change-Id: I134d9c1adf8c772c418f36502b91b514ceade476
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>