Combine chicken with soy sauce, fish sauce, salt, sugar, sesame oil, oyster sauce, black pepper and garlic. Heat oil in pan and add chopped shallots. Add chicken mixture and fry until completely cooked about 10 minutes. Add both types of mushrooms and stir. Combine cornstarch with water and add to the pot. Cook 5 minutes and set aside. Heat oil in large pot. Add shallots and garlic. Fry for 5 minutes. Add rice and fry for 5 minutes. Add broth. Stir once, cover, reduce heat to medium simmer for 20 minutes. Add chicken on top and bring back to a simmer. Serve.