Sets the attributes of the platform application object for the supported push notification services, such as APNS and GCM (Firebase Cloud Messaging). For more information, see <a href="https://docs.aws.amazon.com/sns/latest/dg/SNSMobilePush.html">Using Amazon SNS Mobile Push Notifications</a>. For information on configuring attributes for message delivery status, see <a href="https://docs.aws.amazon.com/sns/latest/dg/sns-msg-status.html">Using Amazon SNS Application Attributes for Message Delivery Status</a>.