Activated abilities are written in the format {cost}:{effect}. (The ability on
Havengul Lich is an activated ability.)
These are the only types abilities that
Havengul Lich gains.
Italicized words, like Lieutenant, are merely there for flavor. They have no bearing on whether it is an activated ability, a triggered ability, or a static ability.
EDIT: a quick search shows that of all the cards printed with the Lieutenant flavor word, NONE have activated abilities.