[EGD-6209] Tethering confirmation popup added

Provided a tethering confirmation popup.
The popup shows up once a USB cable is connected to a PC.

[EGD-6311] Audio settings windows

Added windows for phone call, messages, calendar and alarm clock
vibration and audio settings.

[EGD-6350] Added bluetooth device volume control

Bluetooth device volume control can be set by Pure Phone
while paired and is in A2DP mode. Temporarly disabled
HSP since it's not fully working and causing control issues.

[EGD-6389] Fix database initialization scripts UT

Tests were not passing locally due to incorrect
sql file names.

[EGD-6281] Fix microphone mute

Fix microphone mute during the phone call.
Previously phone would unmute on:
- connecting/disconnecting a jack
- turning loudspeaker on/off
- switching to the bt device.

[EGD-4734] Add PIN settings window

This window displays switch button for
disabling/enabling pin code for sim card.
Its also starting point for changing pin code.
Added actions for enabling and disabling
pin code for sim card.
Added method for checking if pin code is
set for sim card.

[EGD-6454] Remove harness from PR builds

Reorganizing builds and tests, harness will be run by QA Team.

[EGD-4651] Fix CrashDump submodule path

git:protocol requires proper credential, prevents some script to be run
correctly

Merge branch 'stable' - release v0.62.1

add changelog for v0.62.1

[EGD-6416] Add handling of headset keys

Change the volume level using headset keys

[EGD-6422] Add cellular phone mode documentation

Add breif documentation of handling phone modes
is service cellular.

[EGD-5748] Revert remake cellular flow

Reverts changes due to reported issues

[EGD-6425] Update USB submodule version

Restored USB submodule version to HEAD

[EGD-5443] Onboarding date and time window

Add posibility to override bottom bar in Date and Time settings window.
Change primiary action to save in OnBoardingDateAndTimeWindow
Back to previous window after settings date/time in onboarding flow

[EGD-6156] Create crash dumps

Integrate the CrashCatcher library in order to store phone state after
a fault occurs. The dumps are stored in the CrashCatcher hex format and
can be debugged using the CrashDebug stub built for x86_64 via the
'debug_crash_dump.sh' script.

[EGD-6388] Fix TextLine addition and deletion with scroll test

Fixed missing line start condition memorizing on empty blocks
removal.

[EGD-5913] Fixed language assets fallback load

Fixed language assets fallback load bug causing invalid
information display on startup.

[EGD-5909] Fix disable test_usb_echo.py

Test checked for echo mode being enabled, and continued
execution while echo mode was off.

[EGD-6383] Add HW initialization for headset keys detection

Replaced timer-based hander with IRQ handler to get
  headset status

Added initialization for headset key press detection