Fix license in NetworkTestUtil

logback-android/src/test/java/ch/qos/logback/core/testUtil/NetworkTestUtil.java

@@ -1,3 +1,18 @@
+/**
+ * Copyright 2019 Anthony Trinh
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
 package ch.qos.logback.core.testUtil;
 
 import java.net.InetAddress;