Move //webapk to //chrome/android/webapk

chrome/android/webapk/libs/runtime_library/src/org/chromium/webapk/lib/runtime_library/WebApkServiceImpl.java

 // Copyright 2015 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.webapk.lib.runtime_library;
 
 import android.app.Notification;
 import android.app.NotificationManager;
 import android.app.PendingIntent;
 import android.content.Context;
@@ skipping 78 matching lines @@
 
     @Override
     public void closeNotification(String platformTag, int platformID) {
         getNotificationManager().cancel(platformTag, platformID);
     }
 
     private NotificationManager getNotificationManager() {
         return (NotificationManager) mContext.getSystemService(Context.NOTIFICATION_SERVICE);
     }
 }