[webapi][XWALK-1195] Add 44 tests for mediaRenderer

- Add 44 tests for mediaRenderer
- Failure analysis: MediaRenderer does not support

Impacted tests(approved): new 44, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 4, block 40
If `navigator.mediaRenderer` is not implemented or error, there will be only one TIMEOUT result of one test case.