Notification settings.

There are two models supported:

1. Default Notification. The application can customize the title, text and the PendingIntent that will be executed when the default notification is clicked.
2. Custom Notification. Fully customized notification.

Once the service has been started using one type of notification option (default or custom), calls to CastRemoteDisplayLocalService.updateNotificationSettings(CastRemoteDisplayLocalService.NotificationSettings) will expect the same model to be followed.