title: How to search substring using firestore query in firestore document's field?
body: <p>Android/Java:</p>
  
  <p>In firestore document, I have a field "name" which have value <code>America</code> </p>
  
  <p>I want to create a firebase query in the way that if I pass <code>ame</code> in that so it does return all the documents which have <code>ame</code> in the vale of their name field.</p>
  
  <p><code>firebaseFirestore.collection("country").whereContains("name", "ame");</code></p>
  
  <p>In short, I want to search/filter firestore data using substring.   </p>