Add test size annotations to docsui tests.

Required by APCT.

Bug: 25152838
Change-Id: I18629036a7b290719d8faf326117e25b52f0ae07
diff --git a/tests/src/com/android/documentsui/dirlist/MultiSelectManager_GridModelTest.java b/tests/src/com/android/documentsui/dirlist/MultiSelectManager_GridModelTest.java
index c4b6ce5..c856b22 100644
--- a/tests/src/com/android/documentsui/dirlist/MultiSelectManager_GridModelTest.java
+++ b/tests/src/com/android/documentsui/dirlist/MultiSelectManager_GridModelTest.java
@@ -20,11 +20,13 @@
 import android.graphics.Rect;
 import android.support.v7.widget.RecyclerView.OnScrollListener;
 import android.test.AndroidTestCase;
+import android.test.suitebuilder.annotation.SmallTest;
 import android.util.SparseBooleanArray;
 import android.view.View;
 
 import com.android.documentsui.dirlist.MultiSelectManager.GridModel;
 
+@SmallTest
 public class MultiSelectManager_GridModelTest extends AndroidTestCase {
 
     private static final int VIEW_PADDING_PX = 5;