Merge "Handle the cases when RCS config is null" am: b3a224fa12 am: e42b023997 am: 43cab540f5

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1537043

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I970307e264287016d22d8b41507f6265a6b8dc54