Don't check IMS service binding when connecting domain selector

To recover the temporary failure in ImsService connection
don't rely on the current state of the connection.
EmergencyCallDomainSelector shall keep finding next available transport.

Bug: 258289015
Test: atest DomainSelectionResolverTest
Change-Id: Ia39e0c6b0c966d0d5ed0e606128fc62fd7e6b7d9