Clean up pending MO Connection when ImsService Crash

When the ImsService crashes, also cleanup the pending MO so we
do not get into a state where the device thinks that there is a
pending MO call and blocks new outgoing calls.

Fixes: 188625845
Test: atest FrameworksTelephonyTests:ImsPhoneCallTrackerTest
Change-Id: Idda3a6c5f67ee4b43c7f818c34b20dd62bb38b9f