fix(RTC) unconditionally use adapter

It does no harm on RN, since it doesn't detect it as a supported browser
and bails out.

modules/RTC/RTCUtils.js

@@ -1,6 +1,7 @@
 import { getLogger } from '@jitsi/logger';
 import EventEmitter from 'events';
 import clonedeep from 'lodash.clonedeep';
+import 'webrtc-adapter';
 
 import JitsiTrackError from '../../JitsiTrackError';
 import * as JitsiTrackErrors from '../../JitsiTrackErrors';
@@ -19,13 +20,6 @@ import screenObtainer from './ScreenObtainer';
 
 const logger = getLogger(__filename);
 
-// Require adapter only for certain browsers. This is being done for
-// react-native, which has its own shims, and while browsers are being migrated
-// over to use adapter's shims.
-if (browser.usesAdapter()) {
-    require('webrtc-adapter');
-}
-
 const eventEmitter = new EventEmitter();
 
 const AVAILABLE_DEVICES_POLL_INTERVAL_TIME = 3000; // ms

modules/browser/BrowserCapabilities.js

@@ -250,15 +250,6 @@ export default class BrowserCapabilities extends BrowserDetection {
         return this.isChromiumBased() || this.isReactNative() || this.isWebKitBased();
     }
 
-    /**
-     * Checks if the browser uses webrtc-adapter. All browsers except React Native do.
-     *
-     * @returns {boolean}
-     */
-    usesAdapter() {
-        return !this.isReactNative();
-    }
-
     /**
      * Checks if the browser uses RIDs/MIDs for siganling the simulcast streams
      * to the bridge instead of the ssrcs.

types/auto/modules/browser/BrowserCapabilities.d.ts

@@ -123,12 +123,6 @@ export default class BrowserCapabilities {
      * @returns {boolean}
      */
     usesSdpMungingForSimulcast(): boolean;
-    /**
-     * Checks if the browser uses webrtc-adapter. All browsers except React Native do.
-     *
-     * @returns {boolean}
-     */
-    usesAdapter(): boolean;
     /**
      * Checks if the browser uses RIDs/MIDs for siganling the simulcast streams
      * to the bridge instead of the ssrcs.