[EGD-5748] Remake Cellular flow

This commit remakes cellular data flow
introducing full error propagation.

[EGD-5748] Revert remake cellular flow

Reverts changes due to reported issues

[EGD-6121] Add offline mode in service cellular

Adds entering and leaving ito offline mode in sevice
cellular. Outgoin SMS and calls are blocked Proper popups
are shown in applications Call and Messages.

[EGD-5748] Remake Cellular flow

This commit changes TS0710 Worker operation.
1. It introduces MessageBuffers as main
interprocess data passing mechanism.
2. DMA transaction status codes and CMUX errors
are now propagated to Service.
3. Data processing has been refactored.

[EGD-5831] Fix handling URC

Fix handling URC like no carrier

[EGD-5737] Merge master into experimental

Synchronize with master before merging

[EGD-5692] Change URC parsing mechanism

Improved the mechanism for processing URC messages
so that long messages and those containing end of line
inside messages can be handled also if income
in more than one data chunk.

[EGD-5216] Add module-callular unit test

Adds unit tests for TS0710 frame and ATStream.

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-5737] Merge master into experimental

Keep experimental up to date with changes from master

[EGD-2931] Fix private number incoming calls

The change adjusts both cellular service as well as
call and call log applications to handle properly
incoming calls from private numbers.

[EGD-5529] Added CLCC parser

New cmd mechanism implementation of CLCC parser.
Unit tests implementation for the parser.
Refactor of searching for active outgoing call
in service cellular.

[EGD-5599] Change AT and DLC channels for big return

Change which allow to handle large return from
at commands both via UART and DLC-Commands

[EGD-4386] Add VoLTE on/off functionality

Modem setup so that VoLTE connection is possible,
as long as there is LTE coverage
and the operator allows it.

[EGD-4990] Add UT for at+ccfc parser

It adds Unit tests for at+ccfc command parser.

[EGD-5045] Change call flow handling for lock screen

Call requests on lock screen have to be handled
separately to allow only emergency and ICE numbers.

[EGD-5451] Added SMS Center SMSC check to OS

Extended cmd mechanism to provide class defined responses and
implemented SMS center verification to check if SIM card is properly
cofigured and is able to send SMS messagess at all.
This check is needed because if SMS Center is lost we are not able
to send SMS messages with no verbose error codes.
Added milliseconds and noexcept specifiers for at commands
Fixed Chanel name to Channel

[EGD-4861] Call waiting response parser

It allows to show proper GUI windows for call waiting MMI responses.

[EGD-4862] Add CLIP, CLIR etc responses parser

It allows to show proper GUI windows for CLIP,
 CLIR and IMEI MMI response