Yes, low cholesterol and low saturated fats would be a good idea, more protein too since your body is being ordered by the hormone to maintain a greater muscle mass on average whether you work out or not. Of course in general you should make sure you get more fiber than you do protein or carbs and lay off the junk food as much as possible.
I haven't found testosterone to have raised my metabolism by much so it doesn't mean I can eat more even if I appear to get hungry more often.
I would lay off consuming large amounts of soy products as this may counteract your T.