Fully qualifying @Ignore

Strangely, @Ignore-s won't be recognized in ub-launcher-master

Bug: 140837771
Change-Id: Ie5e4911d4812d396826b50024943c14c6bfe3376

tests/src/com/android/launcher3/ui/widget/AddWidgetTest.java

@@ -46,7 +46,7 @@ public class AddWidgetTest extends AbstractLauncherUiTest {
 
     @Test
     @PortraitLandscape
-    @Ignore
+    @org.junit.Ignore
     public void testDragIcon() throws Throwable {
         clearHomescreen();
         mDevice.pressHome();