MockRTCPeerConnectionHandler is currently wired to do NO-OP things or create "dummy" objects that return default values.

1. Should we rename it to DummyRTCPeerConnectionHandler? FakeRTCPeerConnectionHandler?

2. Should we change it into an actual mock using GMOCK?

3. Given that these fake/dummy implementations more often than not create more problems than they solve, should we consider deleting this class in favor of using the real RTCPeerConnectionHandler?