Make home-as-up work in UserDictionarySettings

Since the home-as-up icon is delivered through onOptionsItemSelected,
need to check the ID.

Bug: 6388649
Change-Id: I00041b1a15e102826d05a40fdd288a9d8712dc48

src/com/android/settings/UserDictionarySettings.java

@@ -171,9 +171,12 @@ public class UserDictionarySettings extends ListFragment {
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
+        if (item.getItemId() == OPTIONS_MENU_ADD) {
             showAddOrEditDialog(null);
             return true;
         }
+        return false;
+    }
 
     /**
      * Add or edit a word. If editingWord is null, it's an add; otherwise, it's an edit.