[webapi-usecase][XWALK-2471] Adding back AudioSystem and SSO to tizen

- Add AudioSystem and SSO to tests.tizen.full.xml

Impacted TCs num(approved): New 0, Update 2, Delete 0
Unit test Platform: Tizen IVI:crosswalk 9
Tizen test result summary: Pass 2, Fail 0, Blocked 0