Do not dim environment when while selecting one. (#1720)

Author: MortimerGoro

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/settings/EnvironmentOptionsView.java

@@ -55,6 +55,14 @@ private void initialize(Context aContext) {
         });
     }
 
+    @Override
+    public void onShown() {
+        super.onShown();
+
+        mWidgetManager.pushWorldBrightness(this, WidgetManagerDelegate.DEFAULT_NO_DIM_BRIGHTNESS);
+    }
+
+
     @Override
     public void onHidden() {
         mWidgetManager.popWorldBrightness(this);