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

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



Change-Id: I6f195856b8c973bc7e48826fe61c4769f3ee2d04
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>