Fix drags from the shirt pocket

startDrag() may only be called by/on a view that is in the window that
is currently being touched.

Change-Id: I5de158578dd3f75b5069e5af4f0726576adac4d4
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/ShirtPocket.java b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/ShirtPocket.java
index 658038c..10b52f2 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/tablet/ShirtPocket.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/tablet/ShirtPocket.java
@@ -169,7 +169,7 @@
                         thumb = new DragThumbnailBuilder(mWindow.findViewById(R.id.preview));
                     }
 
-                    ShirtPocket.this.startDrag(clip, thumb, false);
+                    v.startDrag(clip, thumb, false);
 
                     // TODO: only discard the clipping if it was accepted
                     stash(null);