[EGD-6347] Refactored phone modes handling in applications

PhoneModeObserver doesn't work properly in applications.
Applications have to handle the phone mode changes via AppMgr.
Phone mode and tethering handlers separated.

[EGD-6485] ServiceDB cleanup

Remove old unused ServiceDB API and deprecate its remains still being
in use.

[EGD-6504] Only current changes in the relnotes

Include only changes from the current changes in the release notes.

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

[EGD-6208] Add blocking phone mode changes during tethering

When the tethering is enabled, the phone mode shouldn't change,
now, any attempt ends with a notification

Merge branch 'stable' - release v0.62.2

changelog: add changelog for v0.62.2

[EGD-5742] Add audio format checking

Check if decoder's file format is supported by the sink audio device
before playing the sound. Add list of supported formats to each of audio
devices.

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

[EGD-6482] Remove unnecessary iosyscalls messages

Unimplemented syscalls should fail silently to avoid breaking
tests.

[EGD-3469] Fix assets and image creation

Preparing and copying of assets to the image was unreliable.
Switched from cmake mechanism to rsync, making resulting
scheme universal and reducing output folder pollution.

[EGD-6271] Fix Calllog does not correspond changes in PhoneBook

Synchronize caller name with ContactDB

[EGD-6285] Fix system close

Add proper way of closing
system services

[EGD-6324] Update audio assets

Upload latest audio assets. Original file names preserved.

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

[EGD-5567] Add code coverage reporting

Add HTML and XML code coverage report generation with gcovr.

Cleanup unittests list - add missing googletest-gui to the unittests
list; remove dead functional tests.

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

[EGD-6082] Fix cellular start harness test

Improved cellular cold and hot start harness test

[EGD-6433] Implement SIM PIN enable request

Implement SIM PIN enable/disable request
in PinLockHandler

[EGD-6214] Add slider position reading after disabling tethering

To be able to set proper phone mode changed by the slider during
tethering, the forced readout of slider position has been added

[EGD-4736] Change PIN windows

Implement changing SIM PIN code flow

[EGD-6434] Tethering icon updated

Added an icon for tethering.

[EGD-6352] Add Factory reset mode

Stop DB service
Delete DB files
Make reboot

[EGD-6455] Add rsync to docker

Rsync is neeeded for building images