[ios] Add PrivacyInfo with missing API declarations

[kirylkaveryn]

Closes #7754

This PR adds PrivacyInfo file with missing API declarations as described in Documentation.

[biodranik]

Thanks! Should we also craft appropriate string translations? Where/how they will be displayed to users?

[kirylkaveryn]

Thanks! Should we also craft appropriate string translations? Where/how they will be displayed to users?

No! This declarations only for Apple.
And we should only set this new plist and add predefined values into the arrays:

[biodranik]

This one is needed when we add iCloud support:

C617.1
    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.

This one is needed when/if we add "Import bookmarks and tracks" button that will open Files app to select any kml, kmz or gpx. Is it possible @kirylkaveryn ?

3B52.1
    Declare this reason to access the timestamps, size, or other metadata of files or directories that the user specifically granted access to, such as using a document picker view controller.

[biodranik]

Thanks! After rebasing, you can add the container-related file modification part into the iCloud PR (if it is used there).

[kirylkaveryn]

Thanks! After rebasing, you can add the container-related file modification part into the iCloud PR (if it is used there).

Thanks. I already added this task to the Todo list in my PR!