Remove use of private ValueAnimator api

Change-Id: I455edcd17bda83ab51c2c04fa40e66097a4d6975
diff --git a/src/com/android/launcher2/FolderIcon.java b/src/com/android/launcher2/FolderIcon.java
index 76f3114..af3eea9 100644
--- a/src/com/android/launcher2/FolderIcon.java
+++ b/src/com/android/launcher2/FolderIcon.java
@@ -199,7 +199,7 @@
             if (mNeutralAnimator != null) {
                 mNeutralAnimator.cancel();
             }
-            mAcceptAnimator = ValueAnimator.ofFloat(0f, 1f);
+            mAcceptAnimator = LauncherAnimUtils.ofFloat(0f, 1f);
             mAcceptAnimator.setDuration(CONSUMPTION_ANIMATION_DURATION);
 
             final int previewSize = sPreviewSize;
@@ -228,7 +228,7 @@
             if (mAcceptAnimator != null) {
                 mAcceptAnimator.cancel();
             }
-            mNeutralAnimator = ValueAnimator.ofFloat(0f, 1f);
+            mNeutralAnimator = LauncherAnimUtils.ofFloat(0f, 1f);
             mNeutralAnimator.setDuration(CONSUMPTION_ANIMATION_DURATION);
 
             final int previewSize = sPreviewSize;
@@ -574,7 +574,7 @@
         final float transY0 = (mAvailableSpaceInPreview - d.getIntrinsicHeight()) / 2;
         mAnimParams.drawable = d;
 
-        ValueAnimator va = ValueAnimator.ofFloat(0f, 1.0f);
+        ValueAnimator va = LauncherAnimUtils.ofFloat(0f, 1.0f);
         va.addUpdateListener(new AnimatorUpdateListener(){
             public void onAnimationUpdate(ValueAnimator animation) {
                 float progress = (Float) animation.getAnimatedValue();