[EGD-3360] Input and display language separation, input language setting implementation (#920)

[EGD-4158] network access technology added to deviceInfo endpoint (#921)

[EGD-4211] moved test harness into service-desktop (#945)

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

[EGD-2962] Refactor / improve URC handling (#947)

 - QIND URC has been extended to support FOTA reply
 - added support for CLIP, CMTI and POWERED DOWN URCs
 - added support for URC responses codes handling
 - created URCHandler abstraction and moved out URC handling from
   cellular service code
 - URC objects are now created by factory on a basis of URC head, rather
   than previous approach where they were created a priori
 - Renamed classes to be consistent with rest of the project

[EGD-4288] refactor global data (#959)

Reduce firmware size by refactoring global data defined in public
headers.

Each global variable which require runtime initialization adds
initialization code to every translation unit which includes the header
where the variable is defined and declared.

[EGD-3688] usb stack as an external module (#906)

* [EGD-3688] usb stack as an external module
removed old usb code

* [EGD-3688] linux fix

* [EGD-3688] fixes for new USB code

* [EGD-3688] updated submodule

[EGD-4213] Convert service-appmgr to library - library (#960)

[EGD-3147] SMS incoming ASCII characters (#939)

[EGD-4151] Application manager actions introduced. (#905)

* [EGD-4151] Application manifest structure defined.
* [EGD-4156] Applications registry and basic action handler implemented.

EGD-3585 ServiceGUI and ServiceEink initial cleanup (#953)

* EGD-3585 SerwiceGUI and ServiceEink initial cleanup

* moved code to one function per message handling
* removed dead code from comments
* added Service.cpp demangling to debug messages for clear output
* added Response value to return messages to `connect()`

[EGD-3772] added HSP sink and source (#918)

Added HSP playback to the BT device and stream of the BT device microphone back to the OS

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

[EGD-4191] added keyReleased handling from service-desktop (#930)

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

EGD4058 File Indexer Agent query hotfix (#951)

[EGD-4058] Create File Indexer db Agent (#863)

Egd 3676 (#824)

[EGD-3676] Version of PIN SIM handling with mockuped actions (messages)

[EGD-4181] Indexer service scan files (#914)

* [EGD-4181] Initial file indexer service

* [EGD-4181] Initial version of the indexer service

* [EGD-4181] Small changes needed for file indexer

* [EGD-4181] Pass message from vfs to indexer service

* [EGD-4181] Initial indexer service with timers

* [EGD-4181] File indexer service list files

* [EGD-4181] Use default destructor in header

Don't use iterator

* [EGD-4181] Code review fixes.

* [EGD-4030] File indexer handle base mime types

* [EGD-4181] Code review fixes.

* [EGD-4181] Audio file indexer initial stub

* [EGD-4030] Text files indexer

* [EGD-4081] Missing UTF8 file header

* [EGD-4181] Startup paths as an array.

* [EGD-4181] VFS notifier dir fixes

* [EGD-4181] Service fileindexer as static library

* [EGD-4181] Code review fixes

Co-authored-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[EGD-4053] unit tests framework for Settings (#864)

[EGD-4053] update queries

[EGD-4053] connect Settings, SettingsAgent, SettingsMessages and queries

[EGD-4053] change settings interface to async

[EGD-4053] mock-logs.cpp commented out -duplicated symbol in linking

[EGD-4053] review issues solved

EGD-4178 EINK inverted mode (#915)

* EGD-4178 Added simplistic eink invert mode option

EDG-3585 Small fixup for refresh & cleanup in buildDrawLists (#916)

* EGD-3585 Minor refresh fixup&  Normalised buildDrawList everywhere

[EGD-4205] mudita 1st audio assets (#940)