Fix nits in contextual card package.

We missed to catch a few nits in previous CLs. This change cleans up
some of it.

Test: manual
Change-Id: Ibd3466f781952f998e1183a49f56e812cbce99a1

src/com/android/settings/homepage/CardDatabaseHelper.java

@@ -192,7 +192,7 @@ public class CardDatabaseHelper extends SQLiteOpenHelper {
         return sCardDatabaseHelper;
     }
 
-    Cursor getAllContextualCards() {
+    Cursor getContextualCards() {
         final SQLiteDatabase db = this.getReadableDatabase();
         Cursor cursor = db.query(CARD_TABLE, null /* columns */, null /* selection */,
                 null /* selectionArgs */, null /* groupBy */, null /* having */,