[EGD-3510] audio codec configuration for headset microphone (#1004)

[EGD-3510] Audio stereo outputs fixed. Microphone bias handling for headset. Headset microphone gain adjusted.

[EGD-4357] Improve error handling in audio (#990)

 - error code can be now returned also during
   initialization
 - fixed crash when user requested to playback
   file that does not exist

[EGD-4215] Convert service-bluetooth to library

[EGD-4301] Bluetooth Audio profile support (#984)

 - implemented audio sink/source switching
 - reorganized / renamed sound events
 - moved SetBluetoothStreamData and AudioDevice instance to base Operation class
 - added audio profiles RecordingBluetoothHSP, RoutingBluetoothHSP
 - removed unused audio Profiles
 - removed redundant OutputPath and InputPath classes from CodecParamsMAX98090

[EGD-4214] Convert service audio to library

[EGD-4200] Message handling refactored. (#974)

[EGD-4176] Audio state notifications (#937)

[EGD-4118] Audio doxy cleanup (#856)

[EGD-4011] added BT audio device with A2DP playback (#870)

Co-authored-by: SP2FET <bartosz.cichocki@mudita.com>

[EGD-4099] BT set stream (#846)

[EGD-3743] Removed old doxygen copyright statements from project.

[EGD-3743] Update copyrights in fies

[EGD-4128] Fix - routing does not start (#866)

[EGD-4125] Cumulative set of minor fixes for audio (#861)

* fixed choice of input for recording
* fixed vibration setting getter
* fixed response messages from a HandleStop
* improved style of using AudioMux APIs

[EGD-4076] Headphones auto detect fix

[EGD-4023] Vibration - get values from DB (#807)

[EGD-4054] Audio API for setting stream parameters (#826)

[EGD-559] Volume popup - audio part

[EGD-4024] Fix audio files meta tags parsing (#817)

[EGD-4040] Fix endless ringtone playback (#814)