Fix Telecom unit tests for incoming calls.

1. Respond to CallerInfo lookups instead of always waiting for it to timeout (which adds 500ms to every test)
   After this change, telecom unit tests take ~10s less to complete from around ~84s.

2. Do not explictly set handleCreateConnectionSuccess: ConnectionService already does this.
Explicitly setting results in multiple caller info lookups and unexpected behavior.

Change-Id: Ic0abaff6cd8751911733bbc764ac89530b3eb55b