The Last Lion in Kenya

The lion cub pictured above is named Gabriella and lives at an animal orphanage in Nairobi. The Pride of Kenya website reports she lives there because she was left parentless due to a human-lion conflict. (Presumably this explanation means her mother was killed by humans). The post about her goes on to say that her life expectancy in captivity is about 22 years.
In 20 years, according to one estimate, wild lions could be extinct in Kenya. So it is reasonable to wonder if she could be the last, or one of the few lions left in that country in two decades. If she still is alive then, and all the wild lions have been killed via poisonings and habitat loss, there will be no lions left in the wild there - but is a lion living in a cage that has been reared in captivity still a wild animal?