Call Sequencing CUJ Tests

This CUJ test ensures that each combination of 3 tuples of calls
works as expected with sequencing. This CUJ also goes over the single
call scenario for the different types of calls.

Bug: 379937921
Test: atest CtsTelecomCujTestCases:CallSequencingTests
Flag: com.android.server.telecom.flags.enable_call_sequencing
Change-Id: Ia42a46e0ade5066f8df20fc27f074ba2415005a1