Adding some tests for request pin shortcut/widget flow

Bug: 33584624
Change-Id: I49df36f60d2ae071b9d2c77c9c3300e010cd3bb9

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

@@ -41,6 +41,7 @@ public class AddWidgetTest extends LauncherInstrumentationTestCase {
     @Override
     protected void setUp() throws Exception {
         super.setUp();
+        grantWidgetPermission();
 
         widgetInfo = findWidgetProvider(false /* hasConfigureScreen */);
     }