The door is indeed closed. This allows Vincent to bend down and place the MSE-6 Droid on the floor to scurry around the room and investigate (that is to say, look for ways in which it can get back to its programmed duties but since there really isn't any... just scooting around making little annoyed 'statements' in clicks, whirrs and beeps.)

"Found it going through the ducts. You haven't seen this during your time in custodial, have you?"

Yup, that's allll he's here for. To check to see if it's a janitor droid. Nothing else. At all.