Merge "Move PiP window upon tabletop mode changes" into udc-dev am: 545019cb

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21932103



Change-Id: If06bc151c2ebf4626e8c1ca51b772e2ed9b954a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>