/usr/lib/tmpfiles.d/connman_resolvconf.conf is in connman 1.33-3+deb9u1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | d /run/connman - - - -
L+ /etc/resolv.conf - - - - /run/connman/resolv.conf
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