Rinse the rice in a colander until the water runs clear, and then let it dry for 5 minutes. Heat the olive oil in a medium wide-bottom pot over medium heat. Add the curry powder and cumin, and toast for 30 seconds. Add the rice and cook until lightly toasted, 2 minutes. Add the shredded chicken, peas, diced carrots, and 4 cups of the chicken stock, and season with salt and black pepper. Cook uncovered for 5 minutes over medium heat, and then cover and cook for about 25 more minutes. Turn off the heat and let the rice rest for 10 minutes, covered. Fluff with a fork and serve.