To get the bonuses of smartlink you must have A) a smartlink system installed in your character (or Smartlink CF, etc.) and B) you must have smartlink installed on the individual weapon.
You can't install smartlink in a drone itself, as the drone is not specifically a weapon in and of itself. However, I think what you're going for here is a static +2 to weapons used by the drone regardless of what or who is operating it, in which case what you would be looking at is: each of the weapons on the drone need to have smartlink, the pilot program needs a smartlink autosoft installed (if such a thing exists - I don't recall off the top of my head), and you need to have the smartlink CF (again - if such a thing exists, I don't recall off the top of my head if it does).
Now on to answer your sensors question

There is no list specifying what each individual drone and vehicle come with in their sensors package. However, pg 105 of the arsenal book shows a sample of what a vehicle would have.
I think what most vehicles and drones would have can be extrapolated fairly easily from this with a little logic and common sense.
To address your specific example, I would think that yes, you could easily put those sensors in that drone, but then you would be loosing out on some of the basic sensors required by pilot programs, and human to be able to sense their surrounds accurately. Given only an ultra-wideband radar (4), 360° vision with low light and flare comp, and a camera negator, I would think that you (and any pilot program) would have a few (albeit minor) issues. What one would "see" through this drones "eyes" (imho) would be a 3d map of the area it was in, and one very "flat feeling", wide-and-distorted (fisheyed), and squished (to fit in a normal FoV single frame - view of your surroundings.
If it were my game, I would probably impose a small penalty for maneuvering and facing the drone correctly, maybe -1, and a larger penalty the more fine control you were trying to use, probably ranging from -2 to -4. Of course I would say that all of that would be offset by having an (extra) normal camera along with a motion sensor - both in a front facing position, and/or adding a normal radar to the mix which gives you much better visual/spatial relative bearings and distances about the stuff around you (one which could easily be done by getting the "improved sensor array" mod done to your drone/vehicle).
Just my 2 cents.