feat(rtc-stats) Whitelist `rtcstatsEnabled`

react/features/base/config/configWhitelist.js

@@ -15,6 +15,7 @@ export default [
     '_peerConnStatusRtcMuteTimeout',
     'abTesting',
     'analytics.disabled',
+    'analytics.rtcstatsEnabled',
     'audioLevelsInterval',
     'audioQuality',
     'apiLogLevels',