Merge "Formalize CoreCoordinators" into udc-dev am: e7482b5c42 am: 1cbefacd3a

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/22792430

Change-Id: I4bb04791d70d5f604e18e791eb66e04aa2e76ebd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>