Fix a race condition in the animation module

Summary:
update() is called from the choreographer, so it can be
invoked asynchronously relative to RN.  If it's called while the node
tree is incomplete, this can be called with no parent.  Don't treat an
unparented node as an invariant failure, just skip over it.

Reviewed By: AaaChiuuu

Differential Revision: D6249038

fbshipit-source-id: d22807dff1659bf29a81893ab97d0fe7c19de512

Author: mhorowitz

ReactAndroid/src/main/java/com/facebook/react/animated/InterpolationAnimatedNode.java

@@ -1,9 +1,15 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc. All rights reserved.
+ *
+ * <p>This source code is licensed under the BSD-style license found in the LICENSE file in the root
+ * directory of this source tree. An additional grant of patent rights can be found in the PATENTS
+ * file in the same directory.
+ */
 package com.facebook.react.animated;
 
 import com.facebook.react.bridge.JSApplicationIllegalArgumentException;
 import com.facebook.react.bridge.ReadableArray;
 import com.facebook.react.bridge.ReadableMap;
-
 import javax.annotation.Nullable;
 
 /**
@@ -133,8 +139,9 @@ public void onDetachedFromNode(AnimatedNode parent) {
   @Override
   public void update() {
     if (mParent == null) {
-      throw new IllegalStateException("Trying to update interpolation node that has not been " +
-        "attached to the parent");
+      // The graph is in the middle of being created, just skip this
+      // unattached node.
+      return;
     }
     mValue = interpolate(mParent.getValue(), mInputRange, mOutputRange, mExtrapolateLeft, mExtrapolateRight);
   }