Refactor of multiple results pages.

[johndavis92790]

• Remove duplicative SingleGoogleResultData, MultipleGoogleResultData, FavRestaurantData and ReviewRestaurantData interfaces in favor of a more generic Restaurant interface.
• Update every instance of a new restaurant being saved in the database to follow the new Restaurant interface.
• Move setSpinner(false) in FavoriteIcon outside of the if statement and navigate to login page if not logged in.
• Same thing for create review button.
• Add check for if a photo exists in the restaurant object.
• Add titles to different results pages to let user know where they are currently.
• If user is logged in and already reviewed the restaurant, then display create review and delete review buttons.
• Simplify the ReviewRestaurantsResults page to look like the other results pages.
• Create BuildRestaurantObject() function to be resused anywhere in the app that a restaurant will be saved to make sure the restaurants will always be saved in the same fashion.
• Remove unecessary updateReview API call because the postReview will always be used instead.
• Update back end logic and Restaurant Schema to match Restaurant interface better.