title: How to add Gmail annotation automatically in TextInputLayout?
body: <p>I have created Login form with two TextInputLayout fields for email and password. In first TextInputLayout for email, I want to add Gmail annotation (@gmail.com) automatically like below.
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  <a href="https://i.stack.imgur.com/tGMIk.png" rel="nofollow noreferrer">Wanted Output</a></p>
  <p>I think it is best in terms of UX point of view, if user email is abc@gmail.com then he only needs to enter abc and @gmail.com automatically shown.</p>