fix: apple privacy mission permission for extension

[Shahroz16]

closes: https://linear.app/customerio/issue/MBL-263/missing-privacy-manifest-for-notificationservice-extension

adds 1C8F.1

Declare this reason to access user defaults to read and write information that is only accessible to the apps, app extensions, and App Clips that are members of the same App Group as the app itself.

[github-actions]

Sample app builds 📱

Below you will find the list of the latest versions of the sample apps. It's recommended to always download the latest builds of the sample apps to accurately test the pull request.

---

• APN-UIKit: Build failed. See CI job logs to determine the issue and try re-building.
• CocoaPods-FCM: shahroz/MBL-263-apple-privacy-extension-update (1713779697)

[Shahroz16]

closing until we hear more about it from.