Remove use of setFast* properties

Change-Id: Ibfae0eed65d384789929829d6a24379561934eb4
diff --git a/src/com/android/launcher2/PagedView.java b/src/com/android/launcher2/PagedView.java
index c72fdcc..939b7fd 100644
--- a/src/com/android/launcher2/PagedView.java
+++ b/src/com/android/launcher2/PagedView.java
@@ -624,8 +624,7 @@
                 if (child != null) {
                     float scrollProgress = getScrollProgress(screenCenter, child, i);
                     float alpha = 1 - Math.abs(scrollProgress);
-                    child.setFastAlpha(alpha);
-                    child.fastInvalidate();
+                    child.setAlpha(alpha);
                 }
             }
             invalidate();