salut_ft_manager_handle_request: check if ContentHashType is valid
salut_ft_manager_handle_request: check if ContentHashType is valid

freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut,freedesktop-unofficial-mirror/telepathy__telepathy-salut