Emmit media in raw format to allow key frame request

Change-Id: If4ca779e574d63e4b86c2449e6b9fa45b4654bbf
httpendpoint: Reduce from error to warning if some media is not supported

Change-Id: I9c104ca7b0ab0b79b04ff1e26dc0ebeb57cccf1b
playerendpoint: Reduce from error to warn if some media is not supported

Change-Id: Ib02c5f2e0ec745edc90d0c58c68b2f0e40287b28