The Drone will have to have an autosoft to have the skill.
Stealth Autosoft for FlySpy. That can give it Autosoft Rating + Device Rating as the Dice Pool (which is your roll, so you can edge it).
You only use your own skill (in place of the Autosoft) if you are 'jumped in,' in which case you would ALSO use your own Attribute in place of the Device Rating.
Further, for the Fly Spy to perceive, it will need the 'Clearsight' Autosoft as it's 'Perception' skill.
As for Sensors, the Rules are unclear about what you can stuff into some parts, and how that works. For example, you can add an Olfactory sensor to your Sensor pod, but the Olfactory sensor has a rating as well... but nothing to indicate how much that rating costs...? Or if you put a Camera on the sensor pod, what can you stuff the Camera with. Also, nothing indicates if a drone has a sensor 'Array' or a single sensor.
SO, my rules:
The different types of Sensor options are limited by the Sensor rating of the Drone (some drones are large enough to add an additional sensor package). If you put a Camera on the Sensor it is rated at the same rating of the Sensor Rating.
So, with a Sensor Rating of 3, your Fly Spy comes with 3 'Sensors' and if you put a Camera on it, it is a Rating 3 Camera, with 3 Capacity for 'Visual Enhancements.
Sensor Functions are on page 446.