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: 1245b9b7

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



Change-Id: I904ddd6c46e369c074d5fd8a19b80a053e7a5dce
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>