Added HSP ring sound on incoming call event while
there's bluetooth connection active and HSP is
selected as the current profile.
Possibility of pick up/decline the call using
BT device buttons added.
Slightly changed HSP initialization according
to the UML-s added.
Changed call hangup handler in service cellular.
Add basic playback capability using Bluetooth A2DP profile.
Only stereo/44100/16bit files are supported at the moment
Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>
To be able to connect to the BT device with more than one audio
profile, we need something to manage those profiles. Created here
ProfileManager made it convenient
To be able to work properly with BT, CPU freq has to be at least
at Level_5 - to be fixed!
To be able to handle properly the Bluetooth stack we need to
get rid of doubled FreeRTOS task and do refactor of
the whole BT section. This is first part of refactor and it
includes integrating run loop into our worker and unifying
namespaces
