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

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



Change-Id: Id014a591b60a6944dd6e00c474d2441e5c89546c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>