Add test case to verify the fixing video Call goes on hold instead of terminating when accepting 2nd video call as audio only

Make video call from A to B
Answer the call on the B as a video call
Make video call from C to A
Answer the video call as a voice call on the A.
The video call between the A and B must end

Bug: 309548300
Test: atest ImsCallingTest
Change-Id: Ib4ddc4a7d53221ca4110ad08aba06405c232ddee
2 files changed