Remove unnecessary use of some private APIs

Change-Id: Idaba6833ddf4a8615845ca2f643c458bdeb9c403
diff --git a/src/com/android/launcher2/CellLayout.java b/src/com/android/launcher2/CellLayout.java
index c028ff1..0760ee2 100644
--- a/src/com/android/launcher2/CellLayout.java
+++ b/src/com/android/launcher2/CellLayout.java
@@ -17,9 +17,9 @@
 package com.android.launcher2;
 
 import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
-import android.animation.AnimatorListenerAdapter;
 import android.animation.TimeInterpolator;
 import android.animation.ValueAnimator;
 import android.animation.ValueAnimator.AnimatorUpdateListener;