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

This CL ensures Telecom checks if there are any pending connection attempts before we process the requesto to remove a call. This fixes a race condition issue during an MO Fi call we first attempt to place the call via Telephony CS, if that times ouyt after 25s, we will instead attempt to place the call via Tycho CS. This CL ensures we dont remove the call when that timeout triggers before we have time initiate the 2nd connection attempt via Fi.

Test: manual
Bug: 329462734
Flag: com.android.server.telecom.flags.updated_rcs_call_count_tracking
Change-Id: Ib4ff5aefb79e5bed4e39c3929721cc494a95ddb8