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/TaskbarUIController.java

@@ -17,6 +17,10 @@ package com.android.launcher3.taskbar;
 
 import android.graphics.Rect;
 
+import com.android.launcher3.model.data.ItemInfoWithIcon;
+
+import java.util.stream.Stream;
+
 /**
  * Base class for providing different taskbar UI
  */
@@ -35,4 +39,8 @@ public class TaskbarUIController {
     protected void updateContentInsets(Rect outContentInsets) { }
 
     protected void onStashedInAppChanged() { }
+
+    public Stream<ItemInfoWithIcon> getAppIconsForEdu() {
+        return Stream.empty();
+    }
 }