title: MDCTextField rightView property broken on iOS 13
body: <p>I can't use the <code>rightView</code> property with <code>MDCTextField</code> anymore on iOS 13. Am I the only one having an issue with this?</p>
  
  <p>The right view width cover the whole text field: preventing the user interaction and hiding the textView content.</p>
  
  <p>No problem when I switch from <code>MDCTextField</code> to <code>UITextField</code>.</p>