fix(config): cleanup config function (#12690)

* fix(config): avoid cleaning analytics config

* fix cleanup function

react/features/base/config/functions.native.ts

@@ -15,11 +15,18 @@ export * from './functions.any';
  * @returns {void}
  */
 export function _cleanupConfig(config: IConfig) {
-    config.analytics = {};
+    config.analytics = config.analytics ?? {};
     config.analytics.scriptURLs = [];
+
     if (NativeModules.AppInfo.LIBRE_BUILD) {
         delete config.analytics?.amplitudeAPPKey;
         delete config.analytics?.googleAnalyticsTrackingId;
+        delete config.analytics?.rtcstatsEnabled;
+        delete config.analytics?.rtcstatsEndpoint;
+        delete config.analytics?.rtcstatsPollInterval;
+        delete config.analytics?.rtcstatsSendSdp;
+        delete config.analytics?.rtcstatsUseLegacy;
+        delete config.analytics?.obfuscateRoomName;
         delete config.callStatsID;
         delete config.callStatsSecret;
         config.giphy = { enabled: false };