Set choice mode in onCreate to CHOICE_MODE_MULTIPLE so the user can check or uncheck friends.
Created a KEY_FRIENDS_RELATION constant in the ParseConstants class.
Added the clicked user as a relation to the current user in onListItemClick
Called the method saveInBackground to mCurrentUser in order to save the changes on the back end.
Logged error to Log.e if there is no Save call back.
Added ability to remove friend when name is unchecked.
Created method addFriendCheckmarks() to loop throught and check all current friends when user goes back into edit friends.