title: To make default selection in autocomplete (material)
body: <p>I am using autocomplete component(i,e Display value autocomplete) for my project.Here is the <a href="https://stackblitz.com/angular/mkyeqjagjya?file=app%2Fautocomplete-display-example.ts" rel="noreferrer">stackblitz</a> example</p>
  
  <p>How can i set a any one list item as default ? like this
  <a href="https://i.stack.imgur.com/gqXRT.png" rel="noreferrer"><img src="https://i.stack.imgur.com/gqXRT.png" alt="enter image description here"></a></p>