Reparent PiP overlay under task as soon as possible am: e338982c

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Launcher3/+/23731681



Change-Id: I24898f2d39f085f2a70895a7dd55b55a1c2d040b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>