Merge "Add SystemUiSystemPropertiesFlags" into tm-qpr-dev am: 39cb46ea1d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21149318

Change-Id: I271b9f39408cb81f435a20eef12975d3927bba2a
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>