Add calendar-time to response for BroadcastTime

:Release Notes:
Now calendar-time representation available as part of
getBroadcastTime/getEffectiveBroadcastTime responses.

:Detailed Notes:
Added parameter "localtime" which represents calendar time for "local"
parameter.

:Testing Performed:
Tested on desktop build

:QA Notes:

:Issues Addressed:
[GF-40249] Provide API to obtain EBT from luna-sysservice

Open-webOS-DCO-1.0-Signed-off-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Change-Id: I3b3134fff9bb79e2592b1624199922b046519a10
Reviewed-on: https://g2g.palm.com/3606
Reviewed-by: Keith Derrick <keith.derrick@lge.com>
Reviewed-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Tested-by: Nikolay Orliuk <nikolay.orliuk@lge.com>
Reviewed-by: Build Verification