Androids are artificial beings. Some androids are programmed to emulate Human behaviour and emotions. It is unknown whether they are capable of true emotion, or express advanced emergent emotional concepts resulting from complex emulation.
Since the Lumanians created an organic/mechanical hybrid ship, and Lumanian-origin Androids are a part of that ship, Androids are both technology and a unique race.
They can be equipped with super-human strength and many tools. They understand language literally, and struggle to understand and serve.