Hello student,

All the engineering branches that you have mentioned are required for building and developing successful robots. Each branch have their own unique role in the robotics industry such as programming is done by CSE engineers, hardware and embedded programming by ECE engineers, the mechanical components by Mech engineers and the wires and the connections done by the Electrical engineers. Now it depends on you inclination towards the various subjects and aspects of the different branches. However, I still recommend you to not take electrical engineering as it has the least preference in the robotics industry.

I hope this helps, All the Best!