Remove use of private ValueAnimator api

Change-Id: I455edcd17bda83ab51c2c04fa40e66097a4d6975
diff --git a/src/com/android/launcher2/RocketLauncher.java b/src/com/android/launcher2/RocketLauncher.java
index 268769d..6eefedd 100644
--- a/src/com/android/launcher2/RocketLauncher.java
+++ b/src/com/android/launcher2/RocketLauncher.java
@@ -21,7 +21,6 @@
 package com.android.launcher2;
 
 import android.animation.AnimatorSet;
-import android.animation.ObjectAnimator;
 import android.animation.TimeAnimator;
 import android.content.ComponentName;
 import android.content.Context;
@@ -150,11 +149,11 @@
                                 }
                             }, LAUNCH_ZOOM_TIME);
                             endscale = 0;
-                            AnimatorSet s = new AnimatorSet();
+                            AnimatorSet s = LauncherAnimUtils.createAnimatorSet();
                             s.playTogether(
-                                ObjectAnimator.ofFloat(this, "scaleX", 15f),
-                                ObjectAnimator.ofFloat(this, "scaleY", 15f),
-                                ObjectAnimator.ofFloat(this, "alpha", 0f)
+                                LauncherAnimUtils.ofFloat(this, "scaleX", 15f),
+                                LauncherAnimUtils.ofFloat(this, "scaleY", 15f),
+                                LauncherAnimUtils.ofFloat(this, "alpha", 0f)
                             );
 
                             // make sure things are still moving until the very last instant the