/etc/NetworkManager/VPN/nm-strongswan-service.name is in network-manager-strongswan 1.3.0-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 | [VPN Connection]
name=strongswan
service=org.freedesktop.NetworkManager.strongswan
program=/usr/lib/ipsec/charon-nm
[GNOME]
auth-dialog=/usr/lib/NetworkManager/nm-strongswan-auth-dialog
properties=libnm-strongswan-properties
|