Clear separation of RootList Context Menu items and DirList items.

Change-Id: I7f83b21a499de67f628b1fe0cf1582fe70f86c4d
diff --git a/src/com/android/documentsui/ActionHandler.java b/src/com/android/documentsui/ActionHandler.java
index 03e977e..cb66602 100644
--- a/src/com/android/documentsui/ActionHandler.java
+++ b/src/com/android/documentsui/ActionHandler.java
@@ -89,6 +89,8 @@
 
     void selectAllFiles();
 
+    void showCreateDirectoryDialog();
+
     @Nullable DocumentInfo renameDocument(String name, DocumentInfo document);
 
     /**