/usr/share/gconf/schemas/ is in evolution 3.2.3-0ubuntu6.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gconf/schemas/apps-evolution-attachment-reminder.schemas
/usr/share/gconf/schemas/apps-evolution-external-editor.schemas
/usr/share/gconf/schemas/apps-evolution-mail-notification.schemas
/usr/share/gconf/schemas/apps-evolution-mail-prompts-checkdefault.schemas
/usr/share/gconf/schemas/apps-evolution-template-placeholders.schemas
/usr/share/gconf/schemas/apps_evolution_addressbook.schemas
/usr/share/gconf/schemas/apps_evolution_calendar.schemas
/usr/share/gconf/schemas/apps_evolution_email_custom_header.schemas
/usr/share/gconf/schemas/apps_evolution_eplugin_face.schemas
/usr/share/gconf/schemas/apps_evolution_shell.schemas
/usr/share/gconf/schemas/evolution-bogofilter.schemas
/usr/share/gconf/schemas/evolution-mail.schemas
/usr/share/gconf/schemas/evolution-spamassassin.schemas