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: 208bd182 am: 53e00389

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



Change-Id: I5ddcd7187ca7677aac69118aad817b01a690e7d7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>