Describing use of required reason API wrt UserDefaults

[r10s]

we just submitted 1.44.1 to testflight and got the following message back (compliance, compliance -- this complication starts to be enforced on may, 1st)

The uploaded build for Delta Chat has one or more issues. – Hello,

We noticed one or more issues with a recent submission for TestFlight review for the following app: Delta Chat Version 1.44.1 Build 103

Although submission for TestFlight review was successful, you may want to correct the following issues in your next submission for TestFlight review. Once you've corrected the issues, upload a new binary to App Store Connect.

ITMS-91053: Missing API declaration - Your app’s code in the “PlugIns/DcNotificationService.appex/DcNotificationService” file
references one or more APIs that require reasons, including the following API categories: NSPrivacyAccessedAPICategoryUserDefaults. While no action is required at this time, starting May 1, 2024, when you upload a new app or app update, you must include a NSPrivacyAccessedAPITypes array in your app’s privacy manifest to provide approved reasons for these APIs used by your app’s code. For more details about this policy, including a list of required reason APIs and approved reasons for usage, visit: https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api.

ITMS-91053: Missing API declaration - Your app’s code in the “PlugIns/Delta Chat.appex/Delta Chat” file
references one or more APIs that require reasons, including the following API categories: NSPrivacyAccessedAPICategoryUserDefaults. While no action is required at this time, starting May 1, 2024, when you upload a new app or app update, you must include a NSPrivacyAccessedAPITypes array in your app’s privacy manifest to provide approved reasons for these APIs used by your app’s code. For more details about this policy, including a list of required reason APIs and approved reasons for usage, visit: https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api].

ITMS-91053: Missing API declaration - Your app’s code in the “deltachat-ios” file
references one or more APIs that require reasons, including the following API categories: NSPrivacyAccessedAPICategoryUserDefaults. While no action is required at this time, starting May 1, 2024, when you upload a new app or app update, you must include a NSPrivacyAccessedAPITypes array in your app’s privacy manifest to provide approved reasons for these APIs used by your app’s code. For more details about this policy, including a list of required reason APIs and approved reasons for usage, visit: https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api.

Apple Developer Relations

[r10s]

according to https://developer.apple.com/documentation/bundleresources/privacy_manifest_files/describing_use_of_required_reason_api#4278401 , we have to set 1C8F.1 as reason somewhere (allow app+externsions to access UserDefaults)