Android: Add refresh library function.

Source/Android/app/src/main/res/menu/menu_game_grid.xml

@@ -1,7 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/menu_refresh"
+        android:title="@string/grid_menu_refresh"
+        android:icon="@drawable/ic_refresh"
+        android:showAsAction="ifRoom"/>
     <item
         android:id="@+id/menu_settings"
         android:title="@string/grid_menu_settings"
-        android:showAsAction="never"/>
+        android:icon="@drawable/ic_settings"
+        android:showAsAction="ifRoom"/>
+
 </menu>