Clear the promise flag once the restore animation is run

and no more restore related tasks are pending

issue: 17214102

Change-Id: I54c486ff001d74b4961f85947f41848cf92243a3

src/com/android/launcher3/PreloadIconDrawable.java

@@ -189,10 +189,11 @@ class PreloadIconDrawable extends Drawable {
 
     /**
      * Runs the finish animation if it is has not been run after last level change.
+     * @return true if the animation was run.
      */
-    public void maybePerformFinishedAnimation() {
+    public boolean maybePerformFinishedAnimation() {
         if (mAnimationProgress > ANIMATION_PROGRESS_STOPPED) {
-            return;
+            return false;
         }
         if (mAnimator != null) {
             mAnimator.cancel();
@@ -201,6 +202,7 @@ class PreloadIconDrawable extends Drawable {
         mAnimator = ObjectAnimator.ofFloat(this, "animationProgress",
                 ANIMATION_PROGRESS_STARTED, ANIMATION_PROGRESS_COMPLETED);
         mAnimator.start();
+        return true;
     }
 
     public void setAnimationProgress(float progress) {