* Fix of the issue that incoming call triggered
handsfree ringing which didn't stop after
calling side hung up.
* Cleanup of several places in code, minor
bluetooth <-> cellular integration refactor.
Fix of the issue that after connecting
to Bluetooth device it was impossible
to disconnect using Disconnect button.
Refactor of connect/disconnect events
naming (and all names related).
Added tests and calls substate
bluetooth sm diagram created
All old bluetooth tests reviewed and updated
removed new - with queue it's not required
removed TODO
Co-authored-by: Bartosz Cichocki <sp2fet@gmail.com>
To be able to pair properly using SSP the BT device have to know
which services we're running, thus we need to register SDP entries
after startup of the BT stack
Reworked AppSettings handling of BT devices to be prepared for
handling the HFP profile, eliminating by the way few bugs and
speeding up the flow (by getting rid of few refreshes).
Added unit tests for handling the BT devices flow
