Merge "Add test API to confirm enabled status." into udc-dev am: 9c7706fb1a am: 9dcc136364

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22367348

Change-Id: Ic52ed16d727bc6f8522cce4a80785c5eaf4ffdad
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>