Merge "Notify rcs config as needed when RCS service ready, and support test mode" am: cb8481d9e6 am: eacddabbf1

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1612686

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I5bfa95970d14bf1568753217fb2b53c7439288ea