Animate PredictedAppIcon when its icon changes

Reuses the slot machine animation to slide in the new icon. Additionally, staggers based on other icons changing before it.

Test: open apps, watch predictions change
Bug: 197780290
Change-Id: Ib2bc84193a9e350c915dd3486b6c98c6c88d3f83

src/com/android/launcher3/BubbleTextView.java

@@ -256,9 +256,27 @@ public class BubbleTextView extends TextView implements ItemInfoUpdateReceiver,
 
     @UiThread
     public void applyFromWorkspaceItem(WorkspaceItemInfo info) {
+        applyFromWorkspaceItem(info, /* animate = */ false, /* staggerIndex = */ 0);
+    }
+
+    @UiThread
+    public void applyFromWorkspaceItem(WorkspaceItemInfo info, boolean animate, int staggerIndex) {
         applyFromWorkspaceItem(info, false);
     }
 
+    /**
+     * Returns whether the newInfo differs from the current getTag().
+     */
+    public boolean shouldAnimateIconChange(WorkspaceItemInfo newInfo) {
+        WorkspaceItemInfo oldInfo = getTag() instanceof WorkspaceItemInfo
+                ? (WorkspaceItemInfo) getTag()
+                : null;
+        boolean changedIcons = oldInfo != null && oldInfo.getTargetComponent() != null
+                && newInfo.getTargetComponent() != null
+                && !oldInfo.getTargetComponent().equals(newInfo.getTargetComponent());
+        return changedIcons && isShown();
+    }
+
     @Override
     public void setAccessibilityDelegate(AccessibilityDelegate delegate) {
         if (delegate instanceof LauncherAccessibilityDelegate) {