Move Jingle-specific files from talk/session/media to webrtc/libjingle/session/media.  This is part of an ongoing effort to remove Jingle-specific files from the WebRTC repository.

Also, fix the includes and header guards of examples/call.

R=juberti@webrtc.org, pbos@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/34559004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7972 4adac7df-926f-26a2-2b94-8c16560cd09d