[EGD-5919] Fix logs from Service: Cellular, Fota

Remove misleading error message(change to debug/info).
Do not trace as error multiple retry. Minimize (to zero)
error logs on cold and hot start of the phone.

[EGD-4853] Add Wake up GSM modem on demand

System wakes up Cellular when there is a need to communicate
with the modem, e.g. to handle an outgoing call

[EGD-5741] Change cellular DataReceiverHandle refactor

All messages have been moved to separate handlers.

[EGD-5831] Fix handling URC

Fix handling URC like no carrier

Merge branch 'EGD-5737-merge-master-to-exp-lbr-fix'

[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-5319] Add test related to cold and hot start of cellular

Add harness test related to cold and hot start of cellular service

[EGD-5295] Fixes in Calllog app

Fixed some Calllog UI issues:
Fixed lack of calllog entry after call aborting

[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-5677] Tune echo cancellation parameters

Tuned parameters according to Quectel guide

[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-5594] Fix sending multiple cmux frames

Sending multiple cmux frames was broken. Sending at command
longer than 127 bytes caused the modem to freeze.

[EGD-5299] PR comments

Deleted commented-out digital filter calls. Moved QEEC to factory.
Added selection for echo cancellation strength.