add new audio sources for audio capture

This commit adds the following audio capture sources:
- AudioSource.VOICE_PERFORMANCE: for real time live performances like Karaoke.
- AudioSource.ECHO_REFERENCE: for capturing the reference signal to suppress by an echo
canceller. Protected by privileged permission CAPTURE_AUDIO_OUTPUT.

Also added device AUDIO_DEVICE_IN_ECHO_REFERENCE selected when the requested
capture source is AudioSource.ECHO_REFERENCE.

Bug: 118203066
Test: CTS tests for audio capture

Change-Id: I8258296736848986562f7fc89c9260aad562d3d1