Handles videoType from last received presence.

Handles the case where we can receive the presence with the video type before we have received and created the remote track.

modules/xmpp/ChatRoom.js

             mutedNode = filterNodeFromPresenceJSON(pres, "audiomuted");
         } else if (mediaType === MediaType.VIDEO) {
             mutedNode = filterNodeFromPresenceJSON(pres, "videomuted");
+            var videoTypeNode = filterNodeFromPresenceJSON(pres, "videoType");
+            if(videoTypeNode
+                && videoTypeNode.length > 0
+                && videoTypeNode[0])
+                data.videoType = videoTypeNode[0]["value"];
         } else {
             logger.warn("Unsupported media type: " + mediaType);
             data.muted = null;