Merge "Integrate IMS single registration feature into APIs" am: a271c76c47 am: c1743106e8

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1564733

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I52c1370a38f277a7f0b9dc355d225a2cbf1479f8