Adding a second-level domain to the Allow List doesn't allow all subdomains

### Issue Details

Unlike the desktop version, adding a second-level domain (like `google.com`) to the Allow List doesn't allow all subdomains.

- **AdGuard version:**
- AdGuard for iOS v4.5
- **Device model and storage size:**
- iPad Pro 6th gen. 256 GB
- **Operating system and version:**
- iPad OS 16.6

### Expected Behavior

Any subdomains (like `drive.google.com`) should be allowed.

### Actual Behavior

AdGuard is still enabled on subdomains like `drive.google.com` or `mail.google.com`.