Bug 857217 - Put focus in about:home if it is visible instead of always sending it to the layerview. r=Cwiiis

mobile/android/base/BrowserApp.java

@@ -452,7 +452,11 @@ abstract public class BrowserApp extends GeckoApp
                 // put the focus on the layerview and carry on
                 LayerView layerView = mLayerView;
                 if (layerView != null && !layerView.hasFocus() && GamepadUtils.isPanningControl(event)) {
-                    layerView.requestFocus();
+                    if (Boolean.FALSE.equals(mAboutHomeShowing)) {
+                        layerView.requestFocus();
+                    } else {
+                        mAboutHomeContent.requestFocus();
+                    }
                 }
                 return false;
             }