Enable opus/red for the conference even when the browser doesn't support it. (#1309)

* Enable opus/red for the conference even when the browser doesn't support it.

* squash: Remove unused import

modules/xmpp/moderator.js

 import { getLogger } from 'jitsi-meet-logger';
 import { $iq, Strophe } from 'strophe.js';
 
-import browser from '../browser';
 import Settings from '../settings/Settings';
 
 const AuthenticationEvents
                     value: Boolean(config.enableRemb)
                 }).up();
     }
-    if (config.enableOpusRed === true && browser.supportsAudioRed()) {
+    if (config.enableOpusRed === true) {
         elem.c(
                 'property', {
                     name: 'enableOpusRed',