/usr/share/GConf/gsettings/evince.convert is in evince-common 3.14.1-2+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | [org.gnome.Evince]
override-restrictions = /apps/evince/override_restrictions
|