Merge "[RCS] Use the ImsRegistrationCallbackHelper to management the callback...
Merge "[RCS] Use the ImsRegistrationCallbackHelper to management the callback of ImsRegistration" am: 263e7e62 am: 9b14d901 am: 940c3de9
Change-Id: I9b030d58dc881d4a59003671cc0a38635f1ce049