Merge "PiP: Potentially hide menu immediately after it appears." into rvc-dev...

Merge "PiP: Potentially hide menu immediately after it appears." into rvc-dev am: 4757e892 am: 9a056393

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11710013

Change-Id: I748693cf9502f2822c906e58a28fb52e5d956e77