Merge "Merge "Merge "Reparent PiP to split screen on exit" into rvc-dev am:...

Merge "Merge "Merge "Reparent PiP to split screen on exit" into rvc-dev am: 11affeca am: 20dffe01" into rvc-d1-dev-plus-aosp am: 31d23ee7" into rvc-qpr-dev-plus-aosp am: 5ccdb225

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11973248

Change-Id: Ibad064e8ba018349898570d758b9c9af69f4b2ab