Merge "Polish YT auto enter PiP transition" into sc-dev am: 96300694 am: 8b2dfa2f am: 9519f977

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14941602

Change-Id: I33fc4b7df017778a4674b43f836026c070b760e9