Challenge: Efficient RecyclerView Reloading

The notifyDataSetChanged method on your Adapter is a handy way to ask the RecyclerView to
reload all of the items that are currently visible.
The use of this method in CriminalIntent is wildly inefficient because at most one Crime will have
changed when returning to the CrimeListFragment .
Use the RecyclerView.Adapter ’s notifyItemChanged(int) method to reload a single item in the
list. Modifying the code to call that method is easy. The challenge is discovering which position has
changed and reloading the correct item.