[EGD-6807] Add improved brownout detection

Added immproved battery brownout detection
based on filtered voltage measurement

[EGD-6835] Add inotify mechanism in the VFS

Add file monitoring event mechanism to the
VFS subsystem. Now it will be possible to
monitoring file changes in the reistered
path

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

[EGD-5976] Add tethering cellular disabling

This commit adds disabling of URC messages during
tethering mode. It also adds call and sms logging after
tethering is disabled.

[CP-77] Replace receivedAt and sentAt fields with createdAt

sentAt json field was never updated and was not used.
Cleaned up DB and DB interface from unused date_send.

[EGD-6868] Restore magnetometer polling mode

To be able to properly operate with the slider under every
circumstance the polling mode has to be restored. It's related
to the bug in the magnetometer chip, which is not described in the
datasheet.
This reverts commit 744eef1d9b39cdf2cdbc35f57d6182f5e7942c2f with
few small fixes

[EGD-6794] Fix display light settings

This commit provides the flowing fixes in display light functionality:
 - Settings-path bug causing lack of display light settings on "fresh"
 image. Solved with proper paths definition
 - Invalid settings after phone restart. Solved with proper handling
 of enums and booleans on the Event manager side.
 - No turning off light just after turning on light functionality with
 manual brightness setting in ApplicationSettings bug (required
 another key press to start timer that turns off the light after 5s).
 Solved by starting timer explicitly on Action::turnOn
 - No turning off light just after turning on the phone bug (required
 --as above --). Solved by starting timer explicitly on `Settings
 ValueChange` callback with Action::turnOn.
 - No autoMode until user entered `AppSettings::DisplayLight` Window.
 Bug caused by curve parameters being provided by the window rather
 than on the functionality back-end initialization.

 Commit also provides some code cleanup

[BH-399] Cleaning

Cleaned to match newest master

[EGD-6791] Added PhoneUnlock on external MuditaCenter message

Added PhoneUnlock on external MuditaCenter message.

[EGD-6049] Add voice call over HSP

Add support for voice calls over HSP.

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

[EGD-6701] System time usage fixes

Fixed all calls to stdlib time.
Removed all redundant calls to Timestamp treated as time source.

[EGD-6746] Expose new Message types system-wide

Allow all modules to access Request/Notification Message send templates.

[CP-120] Fixed USB comm. when Pure reconnected unlocked

USB comm. was secured when Pure was reconnected to PC while unlocked

[BH-398] Move sml to a separate directory

Move sml to a separate directory

[EGD-5885] Added SimLockHandler

Refactored LockWindow TitleBar handling. Added Sim pin request
block on lockedPhone. Added Sim info popup added when pin
changed. Updated assets. Removed old PinLock structures.
Cleared LockBox structures. Removed old settings sim setters.
New CellularMessage adaptation. Cleared Lock structure.

[EGD-6567] Add GSM time update handling

Adds handling GSM time update in service time.

[EGD-5171] Utils to string fix

Fixed utils to string function to work with 8 bit integers.
Also nodiscard attribute added there.

[EGD-6736] Add app's state dependent autoLock mechanism

This PR provides the implementation of the auto-locking mechanism that
is dependent on an application's current auto-locking policy. Three
auto-lock policies have been introduced:

* DetermineByWindow
* DetermineByAppState
* PreventPermanently

Also changed the AutoLockWindow set/get auto-lock time value to the
message-based approach.

[EGD-6447] Add Bluetooth PIN pairing

Implemented legacy pairing using PIN code

[EGD-6796] Fix excesive ATA command with HSP

This commit fixes excesive ATA cmd in HSP by checking call type in
ServiceCellular.

[BH-356] Move TPLIB (microtar) to separate directory

Move microtar to lib, amend CMAKE files