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 am: 90cbc3a2

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



Change-Id: Iddd71c2da5c5b5b364d26cfb767a236e2cc9dfbe
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>