Divide the shredded chicken evenly between the two pans of dough and spread it around. Sprinkle each pizza with a 1/2 cup of the mozzarella, 1/2 cup of the Cheddar, and 1/2 cup of the Pepper Jack cheese. Bake for 12 to 20 minutes, depending on how done you like your pizzas. Remove the pizzas from the oven and use a flexible spatula to ease around the edges of the pizza, then use it to gently scoot under the pizza and transfer it to a cutting board. Let it cool for at least 5 minutes before slicing. After slicing, top with the shredded lettuce, tomato, onion, avocado, cilantro, and Fritos. Serve immediately.