Add privacy manifest

[nabs-m]

This adds a privacy manifest to the library that declares the reasons for using sensitive APIs. This is a new requirement by Apple and will start being enforced in spring 2024. Any app that consumes Aardvark would get this privacy manifest and doesn't need to redeclare the libraries usage of sensitive APIs.

Out of all sensitive APIs marked by Apple, Aardvark uses 1 file timestamp API, 4 disk space APIs, and the UserDefaults.

Timestamp API

When a bug report is being filed, one of the email attachments lists some files from the app container along with their last modified date. contentModificationDateKey is used here to fetch those dates, which are visible to users in the attachment itself. Below is an example.

This qualifies as reason C617.1 which states:

Declare this reason to access the timestamps, size, or other metadata of files inside the app container, app group container, or the app’s CloudKit container.

File size APIs

Also when a bug report is being filed, in the same attachment as above, disk information is included. This is done here and makes use of the following sensitive APIs:

• volumeAvailableCapacityKey
• volumeAvailableCapacityForImportantUsageKey
• volumeAvailableCapacityForOpportunisticUsageKey
• volumeTotalCapacityKey

Below is an example of what this looks like:

This qualifies as reason 7D9E.1 which is specific to filing bug reports and states:

Declare this reason to include disk space information in an optional bug report that the person using the device chooses to submit. The disk space information must be prominently displayed to the person as part of the report.
Information accessed for this reason, or any derived information, may be sent off-device only after the user affirmatively chooses to submit the specific bug report including disk space information, and only for the purpose of investigating or responding to the bug report.

[jamieQ]

the additions all seem reasonable to me

[nabs-m]

We got rid of UserDefaults references here, so this is ready for review again. Only timestamp and file size APIs are now added to the privacy manifest.

[NickEntin]

Thanks for adding this!

[NickEntin]

Declare this reason to access the timestamps, size, or other metadata of files inside the app container, app group container, or the app’s CloudKit container.

Seems right 👍

[NickEntin]

Declare this reason to include disk space information in an optional bug report that the person using the device chooses to submit. The disk space information must be prominently displayed to the person as part of the report.

Information accessed for this reason, or any derived information, may be sent off-device only after the user affirmatively chooses to submit the specific bug report including disk space information, and only for the purpose of investigating or responding to the bug report.

Yep 👍