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

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



Change-Id: I99ad1306e417f54365ef244f9a080606a0bb8a0c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>