[EGD-5018] Add umount all filesystem

Add umount all mounted filesystem. This function
can be used in the cleanup vfs core stage

[EGD-4918] Change network scan for operators

Change old implementation of network scan. Now in class
which have rest of network settings as NetworkSettings.
Change method from old message style to connect/API.

[EGD-4648] Fix auto screen change

Action `UnlockSim` should be handled only if
there is ongoing SIM flow processing.

[EGD-5004] Add USB-CDC echo mechanism

Added echo mechanism to USB-CDC, update usb_stack submodule
and added a test case to test harness

[EGD-4754] Add automount default filesystems

Default automount and parse partitions according to
their configurations using new vfs core. Currently
old (without lfs) and new (with lfs) part schemes are supported

[EGD-4694] Add CPU frequency shift mechanism

The CPU frequency changes automatically which saves energy

[EGD-4828] Add GUI tests for DOM flow

 * `DepthFirstItemTree` tests - basic traverse functionalities
 * `GuiVisitor` tests - basic double dispatch calls
 * DOM serializer tests - basic serialization functionalities

[EGD-4898] Add GUI for Custom MMI messages- call forwarding

Visitor framework for displaing MMI messages.
GUI for call forwarding custom messages.

[EGD-4727] Change Torch hardware control

Change way of button usage

[EGD-4780] Change in GUI documentation to cover DOM

 * GUI Visitor documentation added
 * GUI DOM documentation added

[EGD-5036] Change new filesystem

Due to vfs deprecation there is need
to remove all vfs calls from code.
This PR covers module bsp.

[EGD-5033] Fix missing texts for ApplicationDesktop

 *Screen and Sim lock windows missing texts added

[DW-31] Add documentation link to the commit format error

Make sure that reference is easily accessible by printing the link to it
on commit message check failure.

[EGD-4502] Fix and remove old vfs boot

Remove old vfs bootconfig from the vfs which
will be removed in the later commit

[EGD-4757] Add unit test for new filesystem

Due to vfs deprecation new filesystem needs
unit tests to verify it's behaviour.This PR
covers core filesystem operations.

[EGD-4927] Change new filesystem

Due to vfs deprecation there is need to remove all vfs calls from code. This PR covers module apps.

[EGD-4788] Add custom repeat window for the alarm application

When choosing alarm repeat option now it is
possible to choose specific days of the week
and their combinations.

[EGD-4992] Add main Security screen

This commit implement only main Security screen.
Change passcode functionality will be implemented
in [EGD-4995].

[EGD-4978] Add Bluetooth virtual audio device

Bluetooth audio device requires different handling than other
audio devices. The commit adds proxy device that does not
handle requests itself but instead sends requests too Bluetooth
service.

[EGD-5035] Fix error translation fs

Quickfix for error translation issue in new filesystem.