[webapi] Update 3 TCs and add 44 TCs for MediaRenderer

- Update the playbackStatus attribute of type and add 44 basic TCs
- Failure analysis: The statuschanged event and rendererlost event cannot be fired

Impacted tests(approved): new 44, update 3, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 72, fail 4, block 12