/usr/lib/tmpfiles.d/spice-vdagentd.conf is in spice-vdagent 0.17.0-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | # spice-vdagentd needs this and does not create it itself
d /var/run/spice-vdagentd 0755 root root -
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