homed: allow systemd-homed access to FIDO2 devices
Add DeviceAllow= option for FIDO2 devices in systemd-homed.service.
(cherry picked from commit 85e424c0c852fcb92d108494a6efa9dd0ce943b2)
(cherry picked from commit 727a03e4826efe1392b8a1899b220e7df7976990)