Write the recording events for webrtc cameras properly in redis

labs/bbb-webrtc-sfu/lib/bbb/messages/Constants.js

labs/bbb-webrtc-sfu/lib/bbb/messages/Messaging.js

...ebrtc-sfu/lib/bbb/messages/video/StartWebcamShareEvent.js

...webrtc-sfu/lib/bbb/messages/video/StopWebcamShareEvent.js

labs/bbb-webrtc-sfu/lib/bbb/pubsub/RedisWrapper.js

labs/bbb-webrtc-sfu/lib/bbb/pubsub/bbb-gw.js

labs/bbb-webrtc-sfu/lib/mcs-core/lib/media/MCSApiStub.js

.../bbb-webrtc-sfu/lib/mcs-core/lib/media/MediaController.js

...bbb-webrtc-sfu/lib/mcs-core/lib/model/RecordingSession.js

labs/bbb-webrtc-sfu/lib/video/video.js