[misc-usecase][XWALK-1195] Add 1 test for mediaRenderer

- Add 1 test for mediaRenderer to scan for media renderers
- Failure analysis: MediaRenderer does not support

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
Merge pull request #512 from yunxliu/yunxliu/misc/mediaRenderer

[misc-usecase][XWALK-1195] Add 1 test for mediaRenderer