/usr/share/kservices5/akonadi/ is in libkf5akonadicontact-data 4:17.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/kservices5/akonadi/contact/
/usr/share/kservices5/akonadi/contact/aimprotocol.desktop
/usr/share/kservices5/akonadi/contact/facebookprotocol.desktop
/usr/share/kservices5/akonadi/contact/gaduprotocol.desktop
/usr/share/kservices5/akonadi/contact/googletalkprotocol.desktop
/usr/share/kservices5/akonadi/contact/groupwiseprotocol.desktop
/usr/share/kservices5/akonadi/contact/icqprotocol.desktop
/usr/share/kservices5/akonadi/contact/ircprotocol.desktop
/usr/share/kservices5/akonadi/contact/jabberprotocol.desktop
/usr/share/kservices5/akonadi/contact/meanwhileprotocol.desktop
/usr/share/kservices5/akonadi/contact/msnprotocol.desktop
/usr/share/kservices5/akonadi/contact/skypeprotocol.desktop
/usr/share/kservices5/akonadi/contact/smsprotocol.desktop
/usr/share/kservices5/akonadi/contact/twitterprotocol.desktop
/usr/share/kservices5/akonadi/contact/yahooprotocol.desktop