/usr/share/accounts/services/ is in kde-config-telepathy-accounts 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/accounts/services/google-im.service
/usr/share/accounts/services/ktp-generic-im.service
/usr/share/accounts/services/ktp-haze-aim-im.service
/usr/share/accounts/services/ktp-haze-gadugadu-im.service
/usr/share/accounts/services/ktp-haze-icq-im.service
/usr/share/accounts/services/ktp-haze-sametime-im.service
/usr/share/accounts/services/ktp-haze-yahoo-im.service
/usr/share/accounts/services/ktp-jabber-im.service
/usr/share/accounts/services/ktp-kde-talk-im.service
/usr/share/accounts/services/ktp-morse-telegram-im.service
/usr/share/accounts/services/ktp-sipe-haze-im.service
/usr/share/accounts/services/ktp-sipe-im.service