Adds an option to set email through iframe API init and to stats. (#4842)

* Adds an option to set email through iframe API init and to stats.

* Simplifies configuring email and displayName in stats.

Removes enableStatsID as not needed as when off we are sending as callstats id xmpp resource which is unique per call and id must be something that sticks between calls (callstatsUsername).

* Adds email and displayName in stats config for mobile.

* chore(deps): Updates lib-jitsi-meet to latest dd31f0a.

* Removes enableStatsID from config and whitelist.

modules/API/external/external_api.js

@@ -232,6 +232,8 @@ export default class JitsiMeetExternalAPI extends EventEmitter {
      * information about new participants that will be invited in the call.
      * @param {Array<Object>} [options.devices] - Array of objects containing
      * information about the initial devices that will be used in the call.
+     * @param {Object} [options.userInfo] - Object containing information about
+     * the participant opening the meeting.
      */
     constructor(domain, ...args) {
         super();
@@ -246,7 +248,8 @@ export default class JitsiMeetExternalAPI extends EventEmitter {
             jwt = undefined,
             onload = undefined,
             invitees,
-            devices
+            devices,
+            userInfo
         } = parseArguments(args);
 
         this._parentNode = parentNode;
@@ -256,7 +259,8 @@ export default class JitsiMeetExternalAPI extends EventEmitter {
             jwt,
             noSSL,
             roomName,
-            devices
+            devices,
+            userInfo
         });
         this._createIFrame(height, width, onload);
         this._transport = new Transport({