Merge "Adds SipDelegateManager#triggerFullNetworkRegistration API" am: c254833490

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

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I51e3f1afbffec2e14c02f06da9bb9bb4bb1e663d