Add ability to check if time was set using LSS

:Release Notes:
Add 'systemTimeSource' field to all 'get*Time' replies
with system time info, to indicate last system time source.
'factory' value means, that time wasn't updated with LSS yet.

:Detailed Notes:

:Testing Performed:
Time behavior has been checked with luna calls.

:QA Notes:

:Issues Addressed:
[GF-58058] System can not tell whether the time has ever been set

Open-webOS-DCO-1.0-Signed-off-by: Alexandr Smoktal <alexandr.smoktal@lge.com>

Change-Id: I110d25686c26dd17a99ec1145f184bfebb1f91e0
Reviewed-on: https://g2g.palm.com/4360
Reviewed-by: DCO Verification
Reviewed-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Reviewed-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Tested-by: Alexandr Smoktal <alexandr.smoktal@lge.com>
Reviewed-by: Andrii Zora <andrii.zora@lge.com>
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>