fix(ReactExoplayerView): disable audio focus

Fix when component initialize, the 'requestAudioFocus' method always request the focus to 'AudioManager' even when the property 'disableFocus' is passed by parameter.
The 'disableFocus' need to be started with 'true' value and a call to 'requestAudioFocus' inside the 'setDisableFocus' need to be perfom to update it.

Video.js

@@ -281,6 +281,10 @@ export default class Video extends Component {
   }
 }
 
+Video.defaultProps = {
+  disableFocus: false
+};
+
 Video.propTypes = {
   /* Native only */
   src: PropTypes.object,

android-exoplayer/src/main/java/com/brentvatne/exoplayer/ReactExoplayerView.java

@@ -125,7 +125,7 @@ class ReactExoplayerView extends FrameLayout implements
     private String textTrackType;
     private Dynamic textTrackValue;
     private ReadableArray textTracks;
-    private boolean disableFocus;
+    private boolean disableFocus = true;
     private float mProgressUpdateInterval = 250.0f;
     private boolean playInBackground = false;
     private boolean useTextureView = false;
@@ -900,6 +900,7 @@ public void setPlayInBackground(boolean playInBackground) {
 
     public void setDisableFocus(boolean disableFocus) {
         this.disableFocus = disableFocus;
+        requestAudioFocus();
     }
 
     public void setFullscreen(boolean fullscreen) {

package.json

@@ -1,6 +1,6 @@
 {
     "name": "react-native-video",
-    "version": "3.2.0",
+    "version": "3.2.1",
     "description": "A <Video /> element for react-native",
     "main": "Video.js",
     "license": "MIT",