Merge "Add test API to confirm enabled status." into udc-dev am: 9c7706fb

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



Change-Id: Ie2c58244db0d237ae0a917489b6a82f2560dc49c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>