If the phone process crashes, have the ImsService detect this condition and destroy all SipDelegates. This allows the AM app to properly recover when telephony comes back up Bug: 195148134 Test: manually crash phone process and then send RCS message Test: atest FrameworksTelephonyTests:SipTransportImplBaseTest Change-Id: I7866273d801df4d2b20e58f5d5ad50fd0ac4303d