Add support for NotificationType LiveActivity

[rrebase]

Description

Apple Introduced Live Activities in iOS 16.1, where updates via remote pushes require usage of a new push type liveactivity

From the docs: https://developer.apple.com/documentation/activitykit/update-and-end-your-live-activity-with-remote-push-notifications

5. Set the value for the apns-push-type header field of the request you sent to APNs to liveactivity.

We can infer it based on the format mentioned in the following statement:

6. Set the apns-topic header field of the request you sent to APNs using the following format: .push-type.liveactivity.

Test plan

• Successfully update a live activity with topic com.example.push-type.liveactivity