refactor(Room service): redeclare the Room service as an independent module

Before:
- we declared the Room service as part of the kabam.webrtc module

After
- declare the Room service as an independent module

Notice:
- when we declaring the service this way, then we should include our custom service module to kabam.webrtc dependencies, if not then we will having this error:
Error: [$injector:unpr] Unknown provider: RoomProvider <- Room
Merge branch 'refactor-room-service'