Merge "Move PiP window upon tabletop mode changes" into tm-qpr-dev am: f542109b9b

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21734145

Change-Id: If42dcc6f7c1ac224b3b93f992c8426d50c6aa18d
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>