ImsConferenceControllerTest extends TelephonyTestBase

This will improve test isolation and reduce test code duplication.

Also, pretend to support Telephony calling

Bug: 365800992
Test: atest com.android.services.telephony.ImsConferenceControllerTest
Flag: EXEMPT only test + extra assertions
Change-Id: Ie350aa91555a4b74c72c2b2ada2862a28370e553
4 files changed