[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5028] Add batt critical level db

Battery critical level sotred in
database.

[EGD-5697] Framework for phone modes introduced

It allows to transmit phone modes information to listening services.

[EGD-4797] Battery bar as widget

Battery bar now is present as
a separate widget in top bar.
Additionally refactored passing
battery status.

[EGD-5158] Change access to the bus methods

The bus is now accessible only via Service object.

[EGD-5377] Add USB charger detection

Added USB stack support for detecting connected charger
Added i.MX RT 1051 HW configuration
Added notification to EventManager for detected charger

[EGD-5390] Add keypad backlight to GUI

Added demo connection to keypad light
GUI window.

[EGD-2514] Fix clock does not refresh

There was no refresh trigger that would cause items like clock
to display its up-to-date state while user is being inactive.
This PR solves that issue providing timer-based refresh trigger
that is dependent on user activity.

Merge branch 'master' into stable

[EDG-4717] Add screen for brightness control

Window for manual and automatic screen brightness control.

Merge commit 'c7dd6b399' into stable

[EGD-2501] Add gsm powerdown due to battery

Gsm model power state maintenance based on battery level.

[EGD-5050] Add brownout detection

Brownout detectection realized through charger driver

[EGD-4694] Add CPU frequency shift mechanism

The CPU frequency changes automatically which saves energy

[EGD-4952] Moved battery level check to separate module

[EGD-4952] Added critical level check + messages

[EGD-4657] screen light control test (#1186)

* [EGD-4654] Light control first working

* [EGD-4654] Extended interface with custom brightness function

* [EGD-4654] Extended set of actions

* [EGD-4654] Fixed timer issue + cleanup

* [EGD-4654] Improving switch-case logic

* [EGD-4654] Moved keypad light control to previous state

* [EGD-4654] Refactor in screen light message

* [EGD-4654] Documentation work

* [EGD-4654] Extension of docu

* [EGD-4654] Typo fixing

* [EGD-4654] More improvements in doc

* [EGD-4654] Doxy generation fixes

* [EGD-4654] Pre pr cleanup

* [EGD-4654] PR comments pt 1

* [EGD-4654] Docu small change

* [EGD-4657] Added tests and fixes

* [EGD-4657] Tests refactor

* [EGD-4657] Proper destruction of timers

* [EGD-4657] Spelling fixes

* [EGD-4657] pre pr cleanup

* [EGD-4657] Build fix

* [EGD-4657] Pr changes pt 1

* [EGD-4657] PR refactor - extracted control algorithm to separate module

* [EGD-4657] Adapted tests to new structure

* [EGD-4657] Cleanup

Co-authored-by: Wojtek Rzepecki <wojtek.rzepecki@mudita.com>