Restore app permissions on restore

[MuntashirAkon]

App permissions should also be restored when restoring an app. To ease the process, the permissions will be saved in the rules files. So, the existence of the rules file not only depends on the has_rules meta but also on the existence of permissions (not all apps use permissions). Permissions will be saved to another file called perms.am.tsv. This has the same format as the exportable rules but will be saved separately to add another option for it.