Add new call states and refactor CAMSM parameters

Add the new simulated ringing and audio processing call states
Refactor CallAudioModeStateMachine's parameters to use a builder
Add stubs in CallAudioManager for the call state transitions

Bug: 140317205
Test: run unit tests
Change-Id: Ic9d6cf77cd2f822536eaab43640c6096d2ce100c
6 files changed