Function safe_app::ffi::mutable_data::permissions::mdata_list_permission_sets

#[no_mangle]
pub unsafe extern "C" fn mdata_list_permission_sets(
    app: *const App, 
    permissions_h: MDataPermissionsHandle, 
    user_data: *mut c_void, 
    o_cb: extern "C" fn(user_data: *mut c_void, result: *const FfiResult, user_perm_sets: *const UserPermissionSet, user_perm_sets_len: usize)
)

Return each (user, permission set) pair in the permissions.