Ignore requests to remove a connMgr call when there are pending connection attempts.

This CL ensures Telecom checks that (1) a connection manager was used for one of the call attempts in CreateConnectionProcessor and (2) there are still pending attempts processing before ignoring the request to remove an emergency call. This logic change only affects the specific case of an emergency call placed over a connection manager (typically Fi) that still has remaining attempts processing.

Bug: 329462734
Test: manual
Flag: EXEMPT unflagged fix for high priority emergency calling bug targeting June QPR
Change-Id: Ie5867e11fd64681f7183a1bd5c58fa2a52b1717f