Add a snapshot of flutter/engine/src/build to our sdk

build/android/gyp/test/java/org/chromium/helloworld/HelloWorldPrinter.java

Index: build/android/gyp/test/java/org/chromium/helloworld/HelloWorldPrinter.java
diff --git a/build/android/gyp/test/java/org/chromium/helloworld/HelloWorldPrinter.java b/build/android/gyp/test/java/org/chromium/helloworld/HelloWorldPrinter.java
new file mode 100644
index 0000000000000000000000000000000000000000..b09673e21f4fd488cb8441002486bb5f8fba032d
--- /dev/null
+++ b/build/android/gyp/test/java/org/chromium/helloworld/HelloWorldPrinter.java
@@ -0,0 +1,12 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.helloworld;
+
+public class HelloWorldPrinter {
+    public static void print() {
+        System.out.println("Hello, world!");
+    }
+}
+