Exclude delay animation from getChildAnimations() list

Bug: 22975427
Change-Id: I8bd9a51f0a886873346d77e9452662301a7c0363
diff --git a/core/java/android/animation/AnimatorSet.java b/core/java/android/animation/AnimatorSet.java
index 5480193..1065ed8 100644
--- a/core/java/android/animation/AnimatorSet.java
+++ b/core/java/android/animation/AnimatorSet.java
@@ -228,7 +228,9 @@
         int size = mNodes.size();
         for (int i = 0; i < size; i++) {
             Node node = mNodes.get(i);
-            childList.add(node.mAnimation);
+            if (node != mRootNode) {
+                childList.add(node.mAnimation);
+            }
         }
         return childList;
     }