/usr/include/KF5/ is in libkf5akonadicontact-dev 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/KF5/Akonadi/
/usr/include/KF5/Akonadi/Contact/
/usr/include/KF5/Akonadi/Contact/AbstractContactFormatter
/usr/include/KF5/Akonadi/Contact/AbstractContactGroupFormatter
/usr/include/KF5/Akonadi/Contact/ContactDefaultActions
/usr/include/KF5/Akonadi/Contact/ContactEditor
/usr/include/KF5/Akonadi/Contact/ContactEditorDialog
/usr/include/KF5/Akonadi/Contact/ContactEditorPagePlugin
/usr/include/KF5/Akonadi/Contact/ContactGroupEditor
/usr/include/KF5/Akonadi/Contact/ContactGroupEditorDialog
/usr/include/KF5/Akonadi/Contact/ContactGroupExpandJob
/usr/include/KF5/Akonadi/Contact/ContactGroupSearchJob
/usr/include/KF5/Akonadi/Contact/ContactGroupViewer
/usr/include/KF5/Akonadi/Contact/ContactGroupViewerDialog
/usr/include/KF5/Akonadi/Contact/ContactParts
/usr/include/KF5/Akonadi/Contact/ContactSearchJob
/usr/include/KF5/Akonadi/Contact/ContactViewer
/usr/include/KF5/Akonadi/Contact/ContactViewerDialog
/usr/include/KF5/Akonadi/Contact/ContactsFilterProxyModel
/usr/include/KF5/Akonadi/Contact/ContactsTreeModel
/usr/include/KF5/Akonadi/Contact/EmailAddressRequester
/usr/include/KF5/Akonadi/Contact/EmailAddressSelection
/usr/include/KF5/Akonadi/Contact/EmailAddressSelectionDialog
/usr/include/KF5/Akonadi/Contact/EmailAddressSelectionWidget
/usr/include/KF5/Akonadi/Contact/RecentContactsCollectionRequestJob
/usr/include/KF5/Akonadi/Contact/SelectAddressBookDialog
/usr/include/KF5/Akonadi/Contact/StandardContactActionManager
/usr/include/KF5/Akonadi/Contact/StandardContactFormatter
/usr/include/KF5/Akonadi/Contact/StandardContactGroupFormatter
/usr/include/KF5/akonadi/
/usr/include/KF5/akonadi-contact_version.h
/usr/include/KF5/akonadi/contact/
/usr/include/KF5/akonadi/contact/abstractcontactformatter.h
/usr/include/KF5/akonadi/contact/abstractcontactgroupformatter.h
/usr/include/KF5/akonadi/contact/akonadi-contact_export.h
/usr/include/KF5/akonadi/contact/contactdefaultactions.h
/usr/include/KF5/akonadi/contact/contacteditor.h
/usr/include/KF5/akonadi/contact/contacteditordialog.h
/usr/include/KF5/akonadi/contact/contacteditorpageplugin.h
/usr/include/KF5/akonadi/contact/contactgroupeditor.h
/usr/include/KF5/akonadi/contact/contactgroupeditordialog.h
/usr/include/KF5/akonadi/contact/contactgroupexpandjob.h
/usr/include/KF5/akonadi/contact/contactgroupsearchjob.h
/usr/include/KF5/akonadi/contact/contactgroupviewer.h
/usr/include/KF5/akonadi/contact/contactgroupviewerdialog.h
/usr/include/KF5/akonadi/contact/contactparts.h
/usr/include/KF5/akonadi/contact/contactsearchjob.h
/usr/include/KF5/akonadi/contact/contactsfilterproxymodel.h
/usr/include/KF5/akonadi/contact/contactstreemodel.h
/usr/include/KF5/akonadi/contact/contactviewer.h
/usr/include/KF5/akonadi/contact/contactviewerdialog.h
/usr/include/KF5/akonadi/contact/emailaddressrequester.h
/usr/include/KF5/akonadi/contact/emailaddressselection.h
/usr/include/KF5/akonadi/contact/emailaddressselectiondialog.h
/usr/include/KF5/akonadi/contact/emailaddressselectionwidget.h
/usr/include/KF5/akonadi/contact/improtocols.h
/usr/include/KF5/akonadi/contact/recentcontactscollectionrequestjob.h
/usr/include/KF5/akonadi/contact/selectaddressbookdialog.h
/usr/include/KF5/akonadi/contact/standardcontactactionmanager.h
/usr/include/KF5/akonadi/contact/standardcontactformatter.h
/usr/include/KF5/akonadi/contact/standardcontactgroupformatter.h