Yeah, I don't really get why robots would campaign for rights.
If a robot was to even gain AI, it still wouldn't have any emotions. It wouldn't care about being included as a being, nor would it care about other robots suffering. Like you said, robots are getting quite smart and have the basic AI to adapt to their situation. But does a robot feel joy when it solves a rubik's cube? Does it get frustrated when it doesn't? Do you think that a future robot would need to? From a purely mechanical standpoint, emotion is a flaw. It's great when you have to protect your species from predators, but that's a null issue when it comes to robots. No emotions, no feeling of oppression, no problem.
People back in the 16th century knew that blacks were humans and they treated them terribly and many were even ashamed of it. That's why we have racism today. But robots aren't humans. Robots won't cry when you take their children (?!) away to be sold. It's just nowhere near the same type of parallel.