title: Display Firebase Database last child, first in RecyclerView
body: <p>I am storing some data in firebase and retrieving it in firebase RecyclerView.
  data is been displayed fine but I want to display data from bottom to top in myrecyclerview because latest added child will be added in the bottom and I wanted to show latest added child in top of myrecyclerview.</p>
  
  <p>I tried <code>myrecyclerview.setReverseLayout(true);</code> but this is taking me to the bottom of my activity where first child is available. rather I want to show my latest child when activity is opened. </p>