Youtube like video track selection

1. Loaded event will give the information about available video tracks
2. selectedVideoTrack prop will give the interface to select the video track. This prop will take the height of the video (Similar to youtube like 144p, 350p etc) and set the video track. If height is 0 then all video tracks will be added to list so that it will work like 'Auto' in youtube

android-exoplayer/src/main/java/com/brentvatne/react/ReactVideoPackage.java

@@ -17,11 +17,6 @@ public class ReactVideoPackage implements ReactPackage {
         return Collections.emptyList();
     }
 
-    // Deprecated RN 0.47
-    public List<Class<? extends JavaScriptModule>> createJSModules() {
-        return Collections.emptyList();
-    }
-
     @Override
     public List<ViewManager> createViewManagers(ReactApplicationContext reactContext) {
         return Collections.<ViewManager>singletonList(new ReactExoplayerViewManager());