Merge "Allow a SipDelegateConnection to trigger a full network registration" am: 841a33a86a

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1520524

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: Ia766ab476e3e704187fe5cb7e0d8a4b760bca5b0