Merge "Adds SipDelegateManager#triggerFullNetworkRegistration API" am: c254833490 am: abd6be2ed6

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1521013

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Id04573ba07f7362ff51474d6fb8d1623a64bea40