[BH-743] Add EventRecord implementation

Add EventRecord implementation + tests

Fix transparent backgrounds in PlantUML

Images generated using PlantUML had transparent backgrounds which made
their text difficult to read on GitHub when using "Dark Mode". Forcing
a background color of #F0F0F0 ensures they are all readable.

[BH-739] Split EventManager

Renaming:
- rename EventManager to EventManagerCommon,
- rename PureEventManager and BellEventManager
to EventManager

[BH-739] Split EventManager

Move `test-settings` to `PurePhone` product-specific directory

[BH-739] Split EventManager

Separate Pure and Bell EventManager functionalities
to separate files.

[BH-733] Cleanup target dependencies

Remove obsolete target dependencies across modules.
Remove 'cross' and 'unittests' targets.
Refactor some remaining target dependencies to use board include macro.

Signed-off-by: Marcin Smoczyński <smoczynski.marcin@gmail.com>

[CP-330] Remove all remounts RW fat partition

FAT is changed only by the updater application
PureOS shouldn't touch the FAT partition

Signed-off-by: Lucjan Bryndza <lucjan.bryndza@mudita.com>

[EGD-7217] Separate commonly used headers from application-calendar

Move dateCommon.hpp to module-utils/time

[CP-46] Extend contact info endpoint

Include email, speed dial, ice and notes.

[BH-395] Librarize application-settings

Librarize application-settings

[BH-690] Add interface for alarm and alarm repo

Definition of basic alarm structures and interfaces

[EGD-7167] Pass IMEI number to Settings

Get IMEI from cellular and display it in Settings

[CP-403] Replace old update code

Removed update related code
Removed update test scripts

[CP-424] Report SN in DeviceInfo data

Added serial number to Device Info data.

[CP-460] Remove duplicated UT case

Removed duplicated test case for FileContext class in
service-desktop unittest.cpp

[CP-266] Extend power management logging

Make sure we print fuel gauge info needed by the electronics team.

[EGD-6946] Fix build for GCC11

Fix build issues identified when building on Fedora 34 using GCC11.

Signed-off-by: Alistair Francis <alistair@alistair23.me>

[EGD-7143] Fix builds for GCC 11

Make sure our code base is buildable using GCC-11
Removed deprecated asan lib from Linux target.

Co-authored-by: Alek  <aleksander.rudnik@mudita.com>
Co-authored-by: Mateusz Piesta  <mateusz.piesta@mudita.com>

[EGD-6776] Music Player All Songs Window

Full MVP design.
Removed redundant Empty Window.
Added play/pause/resume/stop control.

[CP-228] Force flushing of logs before getting log files

Moved flushing function to Logger class
Decreased flushing time to 2 min
Added EM event to request flushing from ServiceDesktop