There should be something akin to a star in the top-left or top-right corner that can be pressed
Upon pressing the star, a method in the LocationDetailActivity should be called to make the location a favorite in Firebase (this is currently missing from the class diagram)
once the location is added as a favorite, the star should be colored in, or something along the same lines should occur
Secondary task:
If possible, make it so that if the star is clicked again the location is removed from the user's favorites and the star is un-filled
Note: if you cannot make it a star that's no big deal, but it should be obvious that it is used to make the location a favorite
In the LocationDetailActivity:
Secondary task:
Note: if you cannot make it a star that's no big deal, but it should be obvious that it is used to make the location a favorite