ref(MediaType): convert to ES6 syntax

JitsiConferenceEventManager.js

 var AuthenticationEvents =
     require("./service/authentication/AuthenticationEvents");
 var Statistics = require("./modules/statistics/statistics");
-var MediaType = require("./service/RTC/MediaType");
+import * as MediaType from "./service/RTC/MediaType";
 
 /**
  * Setups all event listeners related to conference

JitsiMediaDevices.js

 var EventEmitter = require("events");
 var RTCEvents = require('./service/RTC/RTCEvents');
 import RTC from "./modules/RTC/RTC";
-var MediaType = require('./service/RTC/MediaType');
+import * as MediaType from './service/RTC/MediaType';
 import * as JitsiMediaDevicesEvents from "./JitsiMediaDevicesEvents";
 var Statistics = require("./modules/statistics/statistics");
 

JitsiMeetJS.js

 import * as JitsiTrackEvents from "./JitsiTrackEvents";
 var JitsiRecorderErrors = require("./JitsiRecorderErrors");
 var Logger = require("jitsi-meet-logger");
-var MediaType = require("./service/RTC/MediaType");
+import * as MediaType from "./service/RTC/MediaType";
 import RTC from "./modules/RTC/RTC";
 var RTCUIHelper = require("./modules/RTC/RTCUIHelper");
 var Statistics = require("./modules/statistics/statistics");

modules/RTC/JitsiLocalTrack.js

 import * as JitsiTrackErrors from "../../JitsiTrackErrors";
 import * as JitsiTrackEvents from "../../JitsiTrackEvents";
 var logger = require("jitsi-meet-logger").getLogger(__filename);
-var MediaType = require('../../service/RTC/MediaType');
+import * as MediaType from '../../service/RTC/MediaType';
 var RTCBrowserType = require("./RTCBrowserType");
 var RTCEvents = require("../../service/RTC/RTCEvents");
 import RTCUtils from "./RTCUtils";

modules/RTC/JitsiTrack.js

 import RTCUtils from "./RTCUtils";
 import * as JitsiTrackEvents from "../../JitsiTrackEvents";
 var EventEmitter = require("events");
-var MediaType = require("../../service/RTC/MediaType");
+import * as MediaType from "../../service/RTC/MediaType";
 
 /**
  * Maps our handler types to MediaStreamTrack properties.

modules/RTC/RTC.js

 import * as JitsiTrackErrors from "../../JitsiTrackErrors";
 var DataChannels = require("./DataChannels");
 var JitsiRemoteTrack = require("./JitsiRemoteTrack.js");
-var MediaType = require("../../service/RTC/MediaType");
+import * as MediaType from "../../service/RTC/MediaType";
 var TraceablePeerConnection = require("./TraceablePeerConnection");
 var VideoType = require("../../service/RTC/VideoType");
 var GlobalOnErrorHandler = require("../util/GlobalOnErrorHandler");

modules/RTC/RTCUtils.js

 var EventEmitter = require("events");
 var screenObtainer = require("./ScreenObtainer");
 import JitsiTrackError from "../../JitsiTrackError";
-var MediaType = require("../../service/RTC/MediaType");
+import * as MediaType from "../../service/RTC/MediaType";
 var VideoType = require("../../service/RTC/VideoType");
 var CameraFacingMode = require("../../service/RTC/CameraFacingMode");
 var GlobalOnErrorHandler = require("../util/GlobalOnErrorHandler");

modules/connectivity/ParticipantConnectionStatus.js

 /* global __filename, module, require */
 var logger = require('jitsi-meet-logger').getLogger(__filename);
-var MediaType = require('../../service/RTC/MediaType');
+import * as MediaType from '../../service/RTC/MediaType';
 var RTCBrowserType = require('../RTC/RTCBrowserType');
 var RTCEvents = require('../../service/RTC/RTCEvents');
 

modules/xmpp/ChatRoom.js

 const logger = getLogger(__filename);
 import Listenable from "../util/Listenable";
 var XMPPEvents = require("../../service/xmpp/XMPPEvents");
-var MediaType = require("../../service/RTC/MediaType");
+import * as MediaType from "../../service/RTC/MediaType";
 var Moderator = require("./moderator");
 var Recorder = require("./recording");
 var GlobalOnErrorHandler = require("../util/GlobalOnErrorHandler");

service/RTC/MediaType.js

 /**
- * Enumeration of RTC media stream types
- * @type {{AUDIO: string, VIDEO: string}}
+ * The audio type.
  */
-var MediaType = {
-    /**
-     * The audio type.
-     */
-    AUDIO: "audio",
-    /**
-     * The video type.
-     */
-    VIDEO: "video"
-};
-module.exports = MediaType;
+export const AUDIO = "audio";
+
+/**
+ * The video type.
+ */
+export const VIDEO = "video";