/usr/include/accounts-qt5/Accounts/ is in libaccounts-qt5-dev 1.15+17.04.20161104.1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/accounts-qt5/Accounts/Account
/usr/include/accounts-qt5/Accounts/AccountService
/usr/include/accounts-qt5/Accounts/Application
/usr/include/accounts-qt5/Accounts/AuthData
/usr/include/accounts-qt5/Accounts/Error
/usr/include/accounts-qt5/Accounts/Manager
/usr/include/accounts-qt5/Accounts/Provider
/usr/include/accounts-qt5/Accounts/Service
/usr/include/accounts-qt5/Accounts/ServiceType
/usr/include/accounts-qt5/Accounts/account-service.h
/usr/include/accounts-qt5/Accounts/account.h
/usr/include/accounts-qt5/Accounts/accountscommon.h
/usr/include/accounts-qt5/Accounts/application.h
/usr/include/accounts-qt5/Accounts/auth-data.h
/usr/include/accounts-qt5/Accounts/error.h
/usr/include/accounts-qt5/Accounts/manager.h
/usr/include/accounts-qt5/Accounts/manager_p.h
/usr/include/accounts-qt5/Accounts/provider.h
/usr/include/accounts-qt5/Accounts/service-type.h
/usr/include/accounts-qt5/Accounts/service.h
/usr/include/accounts-qt5/Accounts/utils.h