[EGD-6561] Limit calculator decimals to 6 digits

Limit to 6 since our `utils::to_string(double)' function also
limits to 6 decimals.

[EGD-6561] Make calculator input testable

I got sick of manually testing calculator like a troglodyte.

[EGD-6166] HSP ringing

Added HSP ring sound on incoming call event while
there's bluetooth connection active and HSP is
selected as the current profile.
Possibility of pick up/decline the call using
BT device buttons added.
Slightly changed HSP initialization according
to the UML-s added.
Changed call hangup handler in service cellular.

[EGD-6575] Rename Unicast with timeout as UnicastSync

Using Unicast with timeout is dangerous and strongly discouraged.
This change allows for more precise tracking of such cases.

[EGD-6573] Fix default audio paths

Default audio paths updated to the newest ones.

[EGD-6558] Add automount mechanism of the mfgconf

Add optional mounting nfgconf partition on the EEPROM with
the LFS filesystem for the manufacturing data.

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

[EGD-6555] ListView constants move

ListView constants moved from style to ListView.hpp.

[EGD-6559] Fix typos

Corrected typos in config/bootstrap.sh, config/format-config.sh,
config/license_header_check.sh, config/style_check_hook.sh and
in_docker.sh.

[EGD-6560] Do not clear "0" on Enter in calculator

Do not treat input string "0" as erroneous.

[EGD-6552] Options cleanups and fixes

Fixed options crashes and cleared its structure. All
options returns points to proper list indexes.

[EGD-6093] Audio settings API

Refactored Audio settings API.
Moved phone modes logic from serivce audio to service clients level.
Removed redundant API.
Seprated API for vibration and sound enable/disable.
Fixed issues with vibrations logic.

[EGD-6554] Fix emulator to simulator

Fixed every mention of emulator to simulator - in
docs and shell scripts.

[EGD-5238] Fixed diff failure on removed file in clang-check

Checker git diff pass was failing due to diff to removed file

[EGD-6557] Support glibc older than 2.28

Added preprocessor cases to disable code not supported in glibc older

[EGD-6522] Add EEPROM emulation in the emulator

Add possibility to emulate eeprom in the linux emulator

[EGD-6553] ServiceGUI stack depth extended

ServiceGUI stack depth extended from 1024 to 1536 words.

[EGD-6529] Fixed issues with gray colors

The issue occurred on multiple refreshes in the short period of time.
Sometimes, fast refresh was performed instead of the cached deep one.

[EGD-6313] Fix Can not find contact by full name

Add support for contact full nane in queries

[EGD-6534] TextFixedSize crash on char removal fix

Fixed TextFixedSize character removal crash on single line
space case. Added UT to cover it and other missing TextFixed
sized drawLines cases.

[EGD-6515] Answer/reject calls using headset

Clean up propagation of headset keys events
Clean up volume control with headset keys
Update key mappings for simulator
Use headset OK key to answer/reject calls