/usr/share/plasma/services/ is in plasma-workspace 4:5.12.4-0ubuntu3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/plasma/services/activities.operations
/usr/share/plasma/services/applicationjobs.operations
/usr/share/plasma/services/apps.operations
/usr/share/plasma/services/hotplug.operations
/usr/share/plasma/services/modifierkeystate.operations
/usr/share/plasma/services/mpris2.operations
/usr/share/plasma/services/notifications.operations
/usr/share/plasma/services/org.kde.places.operations
/usr/share/plasma/services/org.kde.plasma.clipboard.operations
/usr/share/plasma/services/packagekit.operations
/usr/share/plasma/services/powermanagementservice.operations
/usr/share/plasma/services/share.operations
/usr/share/plasma/services/soliddevice.operations
/usr/share/plasma/services/statusnotifieritem.operations