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: f65f88af am: 6b4504f2

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



Change-Id: I8e8a205ecace1e8a7037f7572d1662c1b5dcee8b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>