Refined audio control interfaces. Implemented pulseaudio based audio routing logic. Updated UI to use audio control interfaces.
Refined audio control interfaces.
Implemented pulseaudio based audio routing logic.
Updated UI to use audio control interfaces.

Signed-off-by: Tom Swindell <d718ec0adad9a12563327e5cf3005e935d762968@rubyx.co.uk>

nemomobile/voicecall-ui-reference