Revert change to public API to fix SAM build

:Release Notes:
Revert LSError* signatures, as they're mocked up by SAM.

:Detailed Notes:

:Testing Performed:
Build and unit tests.

:QA Notes:

:Issues Addressed:
[BHV-1535] Investigate existing wrappers

Open-webOS-DCO-1.0-Signed-off-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>

Change-Id: I875d522023f78a039e6b02bbdf3d430ecb80f46f
Reviewed-on: https://g2g.palm.com/5151
Reviewed-by: DCO Verification
Reviewed-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Tested-by: Anatolii Sakhnik <anatolii.sakhnik@lge.com>
Reviewed-by: Nikolay Orliuk <nikolay.orliuk@lge.com>