[EGD-5967] Add blank screen when off

Present blank screen to
inform the user that phone
is off

[EGD-5660] Add PWM Cpu sentinel

Change of PWM frequency due
to main clock change in low
power operation.

[EGD-5204] Show passcode screen only when PC is connected

USBConfigured event is not fired when powerbank, charger is connected.

[EGD-5204] Show passcode screen only when PC is connected

USBConfigured event is not fired when powerbank, charger is connected.

[EGD-5204] Secure USB communication

Secure all endpoints by returning 403(Forbidden) when USB is connected.
Request screen passcode to enable secured endpoints.

[EGD-5204] Secure USB communication

Secure all endpoints by returning 403(Forbidden) when USB is connected.
Request screen passcode to enable secured endpoints.

Merge branch 'EGD-5737-merge-master-to-exp-lbr-fix'

[EGD-5565] USB: Fix stack size for littlefs

Update USB submodule

[EGD-5737] Fix compilation issues after merge

Master was using some fetures removed by new filesystem

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5503] Fix copyright

Previous commit related to the same ticket introduced invalid copyright
in some files. This commit fixes that.

[EGD-5503] Add watchdog implementation

The system watchdog monitors whether there is message traffic
on the Bus. If no message was sent for an extended period of time,
a reset will occur. It should also protect against system-wide hangs.

On Linux, watchdog is simulated by a FreeRTOS task that will call exit
on timeout.

[EGD-5810] Fix for old batteries

Temporary fix for old batteries

[EGD-3685] PR fixes

Included Alek's suggestions from PR

[EGD-3685] Added infinite repeat

Addef API for infinite vibra repeat

[EGD-3685] PR fixes

Fixes after PR suggestions

[EGD-3685] Fixed linux stubs

Fixed broken linux stubs

[EGD-3685] Vibra handling

Added driver & business logic. Responds to messages.

[EGD-5701] Added DOM dump to harness

* Added generic handler to developerMode
* Added DOM message handling

[EGD-5805] Fix not charging icon

Fix icons behavior in topbar.
When plugged and no charging
regular dischrging icon is
displayed.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master