public class MainActivity extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        // Запрос прав на подключение VPN...

        Intent intent = VpnService.prepare(MainActivity.this);
        startActivityForResult(intent, BIND_AUTO_CREATE);
    }


    // Права полученны...


    @Override
    protected void onActivityResult(int requestCode, int resultCode) {
        if (requestCode == BIND_AUTO_CREATE && resultCode == RESULT_OK) {
            VpnService.Builder bb = new VpnService.Builder();

        }
    }
}

public class VpnService {

    public static class Builder {

    }
}

VpnService.Builder builder = new VpnService.Builder();