finish proto of livekit-ffi (#36)

* ffi req

* handle req_id

* remaining room events

* fix

* Update ffi.proto

* use sid instead of info

* state -> stream_state

* "s"

* participant is optional on data received

* add ReleaseHandleRequest

* Update ffi.proto

* add DataPacketKind

* VideoSinkInfo

* append info

It looks nicer on the FFI languages

* wip

* keep it simple

* Update ffi.proto

* update server to latest proto

* to_i420

* i420_to_abgr

* to_argb

* add publications to ParticipantInfo

It'll be used when we join a Room

* cleanup + DisposeRequest

* fix compilation

* send the whole buffer info with to_i420

livekit/src/room/mod.rs

@@ -55,12 +55,12 @@ pub enum RoomEvent {
         participant: Arc<RemoteParticipant>,
     },
     TrackMuted {
-        publication: TrackPublication,
         participant: Participant,
+        publication: TrackPublication,
     },
     TrackUnmuted {
-        publication: TrackPublication,
         participant: Participant,
+        publication: TrackPublication,
     },
     ActiveSpeakersChanged {
         speakers: Vec<Participant>,