fix(Settings) use a proper UUID rather than hand-rolling it

modules/settings/Settings.js

 import { jitsiLocalStorage } from '@jitsi/js-utils';
 import { getLogger } from '@jitsi/logger';
-
-const logger = getLogger(__filename);
+import { v4 as uuidv4 } from 'uuid';
 
 import UsernameGenerator from '../util/UsernameGenerator';
 
+const logger = getLogger(__filename);
+
 let _callStatsUserName;
 
 let _machineId;
  * @returns {string} random unique id
  */
 function generateJitsiMeetId() {
-    const jitsiMeetId = generateUniqueId();
+    const jitsiMeetId = uuidv4().replaceAll('-', '');
 
     logger.log('generated id', jitsiMeetId);
 
     return jitsiMeetId;
 }
-
-/**
- *
- */
-function generateUniqueId() {
-    return _p8() + _p8() + _p8() + _p8();
-}
-
-/**
- *
- */
-function _p8() {
-    return `${Math.random().toString(16)}000000000`.substr(2, 8);
-}