Fix a small UI nit with screen reordering

-> When in overview mode, flinging the pages can leave the scroller
   running (invisibly) for much additional time, since the scroller
   fling bounds far exceed the alloawble scroll bounds (in order to
   achieve a hard wall type effect)
-> When this is happening, user couldn't pick up a page for reordering
-> Ended the scroller early in this case to avoid the problem

Change-Id: I8b6f140d9a87bb742e57625e90ca7d76a2158e28

src/com/android/launcher3/PagedView.java

@@ -567,6 +567,13 @@ public abstract class PagedView extends ViewGroup implements ViewGroup.OnHierarc
     public void scrollTo(int x, int y) {
         // In free scroll mode, we clamp the scrollX
         if (mFreeScroll) {
+            // If the scroller is trying to move to a location beyond the maximum allowed
+            // in the free scroll mode, we make sure to end the scroll operation.
+            if (!mScroller.isFinished() &&
+                    (x > mFreeScrollMaxScrollX || x < mFreeScrollMinScrollX)) {
+                forceFinishScroller();
+            }
+
             x = Math.min(x, mFreeScrollMaxScrollX);
             x = Math.max(x, mFreeScrollMinScrollX);
         }