Add File Browser screen to new UI.

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/menu_up_one_level"
+        android:title="@string/add_directory_up_one_level"
+        android:showAsAction="ifRoom|withText"/>
+</menu>

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

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+    <item
+        android:id="@+id/clearGameList"
+        android:title="@string/clear_game_list"
+        android:showAsAction="never"/>
+</menu>