/usr/share/glib-2.0/schemas/org.gnome.evolution-data-server.addressbook.gschema.xml is in evolution-data-server-common 3.28.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 | <?xml version="1.0" encoding="UTF-8"?>
<schemalist>
<schema path="/org/gnome/evolution-data-server/addressbook/" id="org.gnome.evolution-data-server.addressbook" gettext-domain="evolution-data-server">
<key type="s" name="self-contact-uid">
<default>''</default>
<summary>Contact UID of a user</summary>
</key>
</schema>
</schemalist>
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