title: need clearty on solutions-ios-push-notification
body: <p>Does code provided in "<a href="https://github.com/GoogleCloudPlatform/solutions-ios-push-notification-sample-backend-java" rel="nofollow">https://github.com/GoogleCloudPlatform/solutions-ios-push-notification-sample-backend-java</a>" support to send push notification on iOS device as well as Android device.</p>