[Cronet] Test the libcronet that's shipped, not libcronet_test

components/cronet/android/test/src/org/chromium/net/NetworkChangeNotifierUtil.java

-// 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.net;
-
-import org.chromium.base.annotations.JNINamespace;
-
-/**
- * Wrapper class that contains utility methods to test network change notifier.
- */
-@JNINamespace("cronet")
-public final class NetworkChangeNotifierUtil {
-    public static boolean isTestIPAddressObserverCalled() {
-        return nativeIsTestIPAddressObserverCalled();
-    }
-
-    private static native boolean nativeIsTestIPAddressObserverCalled();
-}