/**
* Create a program that implements a simple mobile phone with the following capabilities.
* Able to store, modify, remove and query contact names.
* You will want to create a separate class for Contacts (name and phone number).
* Create a master class (MobilePhone) that holds the ArrayList of Contacts
* The MobilePhone class has the functionality listed above.
* Add a menu of options that are available.
* Options:
* - Quit
* - Print list of contacts
* - Add new contact
* - Update existing contact
* - Remove contact
* - Search / find contact
* When adding or updating be sure to check if the contact already exists (use name)
* Be sure not to expose the inner workings of the Arraylist to MobilePhone
* e.g. no ints, no .get(i) etc
* MobilePhone should do everything with Contact objects only.
*/