Fixed a number of issues with the Notification Service Extension

[mpretty-cyro]

• Fixed an issue where receiving a PN for outgoing messages could break the NotificationServiceExtension
• Fixed an issue where the NotificationServiceExtension could startup in an invalid way resulting in subsequent PNs failing to process
• Fixed an issue where you could incorrectly receive multiple generic notifications after receiving an incoming call notification
• Fixed an issue where the read state syncing might not clear notifications from the notification center
• Fixed an issue with parsing Bencoded data
• Updated the PN subscription to subscribe to CONVO_INFO_VOLATILE notifications (update read state)
• Updated the NotificationServiceExtension to use standard message processing where possible
• Updated the NotificationServiceExtension to update the app badge based on a database query