Add "wave" animation when entering taskbar edu

Each icon scales and translates up, then back down. If the icon is predicted, it also plays a "slot machine" animation through random icons from AllAppsList.

Test: Visual
Bug: 180605356
Change-Id: Ia41cb0e340347eea6b580d23c8a2386837e9c399

quickstep/src/com/android/launcher3/taskbar/TaskbarViewController.java

@@ -111,6 +111,10 @@ public class TaskbarViewController {
         return mTaskbarView.getIconLayoutBounds();
     }
 
+    public View[] getIconViews() {
+        return mTaskbarView.getIconViews();
+    }
+
     public AnimatedFloat getTaskbarIconScaleForStash() {
         return mTaskbarIconScaleForStash;
     }