[EGD-7124] Add import contacts from sim

Added imort contacts from sim card.

[CP-288] Update secureboot documentation

Update documentation about secureboot

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

[EGD-7162] Removed sensitive data from settings app

During validation tests of EGD-6962 found
sensitive data being logged in settings app.
This PR deletes all of those.

[EGD-7139] System setting cleanup and fixes

Security setting cleanup. Refactored Technical
Information window.

[EGD-7088] SDRAM configuration on T7 board

Add configuration for new, increased to 64 MB SDRAM.

[BH-375] Clean `module-utils/third-party`

Clean `module-utils/third-party`

Merge branch 'stable' - release v0.73.1

[EGD-6928] Fix system powe instability

Improved frequency switching mechanism

[CP-326] Reformat recovery partition as littlefs

Recovery partition will be needed by update process for store and
process update data recovery etc
But using fat partition is due to
problem with power loss in not
recommended.
This patch change BACKUP partition to the LFS

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

[EGD-7138] Security setting cleanup and fixes

Security setting cleanup. Removed not used torch windows.

[EGD-7136] Apps setting cleanup and fixes

Apps setting cleanup. Disabled in UI not working options.

[EGD-7136] Phone modes setting cleanup and fixes

Phone modes setting cleanup. Fixed text top padding.
Fixed titles and selector in phone modes. Updated arrows.

[BH-384] Turned application desktop to library

Defined separated cmake library, private and public include
directories and dependencies, isolated public headers from private,
cleaned up include paths and defined which targets depend on new
library, cleaned up include paths

[BH-628] Cleaned up module-vfs cmake

Cleaned up pattern of sharing source files among libraries
using cached lists, ultimately leading to silent linkage
failures. Symbols build repeatedly in different libraries
was linked depending on which library was passed in linker
command arguments first, so for example in same cases
cellular bsp files compiled in module-vfs was linked instead
of those from module-bsp leading to failure of cellular work
despite no explicite build failure.

[EGD-7135] Display and keypad setting cleanup and fixes

Display and keypad setting cleanup. Moved settings window
Names to separate file. Added selective build options.
Fixed SpinBox arrows position. Fixed focus on window start
in InputLanguageWindow and KeypadLightWindow. Moved AutoLock
to Security. Disabled not working options in UI.

[EGD-6212] Add tethering doc

This commit adds list of currently supported systems that are
check for working with tethering. Rest of the doc will be updated
with another commit

[CP-215] Expose current operator name in service desktop API

Get current operator name from cellular modem,
and expose it in service desktop API to let
Mudtia Center use it.

[EGD-7145] Fix mp3 tags fetch

Fixed problem with some mp3 files which wasn't available in the list
of tracks. Issue was occuring due to the large buffer allocation.

[CP-335] Fix formatting of SN

A serial number in the USB descriptor includes additional zeros 0
if it’s shorter than the placeholder space.

[EGD-7149] Fix connecting BT devices

Some devices were giving different results after querying for
Class of Device (CoD) and our filters were too restrictive.

Now filtering only take place at pairing, so every suitable
device can be connected