Merge "Do not create window decorations for split roots" into udc-dev am:...

Merge "Do not create window decorations for split roots" into udc-dev am: 782fc415 am: c06c1515 am: c04afaa3

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23013944



Change-Id: I6728b59dc584530e70e5982e9e6a013c4909e459
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>