You can definitely salvage overcooked, dry chicken. Some suggestions would be to make a quick pan gravy with chicken broth, seasonings and a bit of flour, cornstarch or Arrowroot powder. You could also make a dipping sauce of mayonnaise and hot sauce or chili sauce. Or make a quick lemon, herb and butter sauce. And you could remove the skin, shred the meat, add barbecue sauce and you will have a quick version of pulled chicken.