Merge "Also check PiP activity visibility to determine if enter-pip" into...

Merge "Also check PiP activity visibility to determine if enter-pip" into udc-dev am: cc054b94 am: 2da54539 am: 66529587

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23754867



Change-Id: Ia2bf8b65a838626ea7befac971dd6aa8ffd73910
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>