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

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I08ccc132fc67c79e53cb1de5f64d2d26fdf78476