Populate SDP cid in track info when available. (#3845)

* Populate SDP cid in track info when available.

- Adding SDP cid to TrackInfo. Browsers like FF uses a different stream
  id for AddTrack and actual SDP offer. So, have to look up using both
  on server side. To make it easier, store both (only if different) in
  TrackInfo.
- Use a codec in TrackInfo for audio also. There is some discussion
  around doing simulcast codec for audio so that something like PSTN can
  use G.711 without any transcoding. So, just keep it consistent between
  audio and video.
- Populate SDP cid when SDP offer is received. It could populate a
  pending track or an already published track if the new offer is for a
  back up codec where the primary codec is already published.
- Passed around parsed offer to more places to avoid parsing multiple
  times.
- Clean up MediaTrack interface a bit and remove unneeded methods.

* WIP

* WIP

* deps

* stream allocator mime aware

* clean up

* populate SDP cid before munging

* interface methods

pkg/routing/routingfakes/fake_message_sink.go

@@ -243,14 +243,6 @@ func (fake *FakeMessageSink) WriteMessageReturnsOnCall(i int, result1 error) {
 func (fake *FakeMessageSink) Invocations() map[string][][]interface{} {
 	fake.invocationsMutex.RLock()
 	defer fake.invocationsMutex.RUnlock()
-	fake.closeMutex.RLock()
-	defer fake.closeMutex.RUnlock()
-	fake.connectionIDMutex.RLock()
-	defer fake.connectionIDMutex.RUnlock()
-	fake.isClosedMutex.RLock()
-	defer fake.isClosedMutex.RUnlock()
-	fake.writeMessageMutex.RLock()
-	defer fake.writeMessageMutex.RUnlock()
 	copiedInvocations := map[string][][]interface{}{}
 	for key, value := range fake.invocations {
 		copiedInvocations[key] = value

pkg/routing/routingfakes/fake_message_source.go

@@ -234,14 +234,6 @@ func (fake *FakeMessageSource) ReadChanReturnsOnCall(i int, result1 <-chan proto
 func (fake *FakeMessageSource) Invocations() map[string][][]interface{} {
 	fake.invocationsMutex.RLock()
 	defer fake.invocationsMutex.RUnlock()
-	fake.closeMutex.RLock()
-	defer fake.closeMutex.RUnlock()
-	fake.connectionIDMutex.RLock()
-	defer fake.connectionIDMutex.RUnlock()
-	fake.isClosedMutex.RLock()
-	defer fake.isClosedMutex.RUnlock()
-	fake.readChanMutex.RLock()
-	defer fake.readChanMutex.RUnlock()
 	copiedInvocations := map[string][][]interface{}{}
 	for key, value := range fake.invocations {
 		copiedInvocations[key] = value

pkg/routing/routingfakes/fake_room_manager_client.go

@@ -129,10 +129,6 @@ func (fake *FakeRoomManagerClient) CreateRoomReturnsOnCall(i int, result1 *livek
 func (fake *FakeRoomManagerClient) Invocations() map[string][][]interface{} {
 	fake.invocationsMutex.RLock()
 	defer fake.invocationsMutex.RUnlock()
-	fake.closeMutex.RLock()
-	defer fake.closeMutex.RUnlock()
-	fake.createRoomMutex.RLock()
-	defer fake.createRoomMutex.RUnlock()
 	copiedInvocations := map[string][][]interface{}{}
 	for key, value := range fake.invocations {
 		copiedInvocations[key] = value

pkg/routing/routingfakes/fake_router.go

@@ -845,32 +845,6 @@ func (fake *FakeRouter) UnregisterNodeReturnsOnCall(i int, result1 error) {
 func (fake *FakeRouter) Invocations() map[string][][]interface{} {
 	fake.invocationsMutex.RLock()
 	defer fake.invocationsMutex.RUnlock()
-	fake.clearRoomStateMutex.RLock()
-	defer fake.clearRoomStateMutex.RUnlock()
-	fake.createRoomMutex.RLock()
-	defer fake.createRoomMutex.RUnlock()
-	fake.drainMutex.RLock()
-	defer fake.drainMutex.RUnlock()
-	fake.getNodeForRoomMutex.RLock()
-	defer fake.getNodeForRoomMutex.RUnlock()
-	fake.getRegionMutex.RLock()
-	defer fake.getRegionMutex.RUnlock()
-	fake.listNodesMutex.RLock()
-	defer fake.listNodesMutex.RUnlock()
-	fake.registerNodeMutex.RLock()
-	defer fake.registerNodeMutex.RUnlock()
-	fake.removeDeadNodesMutex.RLock()
-	defer fake.removeDeadNodesMutex.RUnlock()
-	fake.setNodeForRoomMutex.RLock()
-	defer fake.setNodeForRoomMutex.RUnlock()
-	fake.startMutex.RLock()
-	defer fake.startMutex.RUnlock()
-	fake.startParticipantSignalMutex.RLock()
-	defer fake.startParticipantSignalMutex.RUnlock()
-	fake.stopMutex.RLock()
-	defer fake.stopMutex.RUnlock()
-	fake.unregisterNodeMutex.RLock()
-	defer fake.unregisterNodeMutex.RUnlock()
 	copiedInvocations := map[string][][]interface{}{}
 	for key, value := range fake.invocations {
 		copiedInvocations[key] = value

pkg/routing/routingfakes/fake_signal_client.go

@@ -173,10 +173,6 @@ func (fake *FakeSignalClient) StartParticipantSignalReturnsOnCall(i int, result1
 func (fake *FakeSignalClient) Invocations() map[string][][]interface{} {
 	fake.invocationsMutex.RLock()
 	defer fake.invocationsMutex.RUnlock()
-	fake.activeCountMutex.RLock()
-	defer fake.activeCountMutex.RUnlock()
-	fake.startParticipantSignalMutex.RLock()
-	defer fake.startParticipantSignalMutex.RUnlock()
 	copiedInvocations := map[string][][]interface{}{}
 	for key, value := range fake.invocations {
 		copiedInvocations[key] = value