In the "Escape from the Finalizer" level (third level), you will gain access to a different type of droid, the protocol droid. When you complete the level, go back to it in freeplay from the map, pick the first checkpoint, and run straight for the control panel. It's right near the start of the level so will only take a few seconds to reach. Simply pick a different droid (BB-8 is the easiest choice) and interact with the panel.
Achievement unlocked! As far as I know, this is the earliest opportunity to get this.