Merge "Notify rcs config as needed when RCS service ready, and support test mode" into sc-dev am: 1d165d736f

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telephony/+/13638219

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Idf694e773454c200477d209d212633efb06a4c73