Using state animation to control all-apps transition

> Separating all-apps transtions control and vertical shift touch handling
> Creating separate spring handler for search box (to avoid adding and removing spring)
> Driving all-apps vertical shift using state AnimatorSet

Bug: 67678570
Change-Id: I3b6a4d1f43275a5f485b399444742b6b9a8c4bb9

src/com/android/launcher3/Workspace.java

@@ -1582,6 +1582,7 @@ public class Workspace extends PagedView
 
         ValueAnimator stepAnimator = ValueAnimator.ofFloat(0, 1);
         stepAnimator.addUpdateListener(listener);
+        stepAnimator.setDuration(config.duration);
         anim.play(stepAnimator);
         anim.addListener(listener);
     }