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: fd9d95ec

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



Change-Id: Ie953f53865f0f24159b907df7b0e34fe230190a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>