[webapi][XWALK-2103]Update the vauleToSet for audiosystem

- Fail Reason: the error callback is invoked.

Impacted TCs num(approved): New 0, Update 4, Delete 0
Unit test Platform: [Tizen IVI]
Test result summary: Pass 0, Fail 4, Blocked 0
Merge pull request #453 from JianfengXu/xujf/audiosystem/2103

[webapi][XWALK-2103]Update the vauleToSet for audiosystem