Merge "Reparent PiP overlay under task as soon as possible" into udc-dev am:...

Merge "Reparent PiP overlay under task as soon as possible" into udc-dev am: ccafc6b3 am: 493959ca am: d6333ffa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23732847



Change-Id: I5ff3b18434ecba5c575c6256d5b62e1661f2c3d5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>