Add debug logs to folder open anim

Bug: 383526431
Flag: EXEMPT logs only
Test: None
Change-Id: Ib18d63e7f8ab194f8fda74aa99d99c9aa27f5f19

src/com/android/launcher3/folder/FolderPagedView.java

@@ -58,6 +58,7 @@ import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.atomic.AtomicInteger;
 import java.util.function.ToIntFunction;
 import java.util.stream.Collectors;
 
@@ -531,6 +532,16 @@ public class FolderPagedView extends PagedView<PageIndicatorDots> implements Cli
         verifyVisibleHighResIcons(getCurrentPage() + 1);
     }
 
+    int getTotalChildCount() {
+        AtomicInteger count = new AtomicInteger();
+        iterateOverItems((i, v) -> {
+            count.getAndIncrement();
+            return false;
+        });
+
+        return count.get();
+    }
+
     /**
      * Ensures that all the icons on the given page are of high-res
      */