Add NetworkChangeNotifier for Android.

net/android/network_change_notifier_factory.cc

+// Copyright (c) 2012 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.
+
+#include "net/android/network_change_notifier_factory.h"
+
+#include "net/android/network_change_notifier.h"
+
+namespace net {
+namespace android {
+
+NetworkChangeNotifierFactory::NetworkChangeNotifierFactory() {}
+
+net::NetworkChangeNotifier* NetworkChangeNotifierFactory::CreateInstance() {
+  return new NetworkChangeNotifier();
+}
+
+}  // namespace android
+}  // namespace net