Merge "Reduce flickering when exiting PiP to fullscreen" into udc-dev am: a5de62db

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23694223



Change-Id: I025ceef2f7ba8e24f65ab69feb405cfc3aa3bc54
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>