Merge "Add comments stating the configs for visible background users are not...

Merge "Add comments stating the configs for visible background users are not ready for production" into udc-dev am: 5191e0d7 am: b959b762 am: 432a8daa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24140525



Change-Id: Iac873f633a739640c72f234d8b911ef0fcd0640c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>