React Native uses Plan B

Otherwise, RTX may break setRemoteDescription and the respective
receive video(s) will not render because their packets will be dropped.

modules/RTC/RTCBrowserType.js

@@ -159,8 +159,11 @@ var RTCBrowserType = {
     },
 
     usesPlanB: function() {
-        return RTCBrowserType.isChrome() || RTCBrowserType.isOpera() ||
-            RTCBrowserType.isTemasysPluginUsed();
+        return (
+            RTCBrowserType.isChrome()
+                || RTCBrowserType.isOpera()
+                || RTCBrowserType.isReactNative()
+                || RTCBrowserType.isTemasysPluginUsed());
     },
 
     usesUnifiedPlan: function() {