title: remove/hide card.io/paypal logo android
body: <p>I am integrating Card.io in my android app and I want to remove the paypal logo. 
  I searched stackoverflow and got to know the usage of EXTRA_USE_CARDIO_LOGO.</p>
  
  <p>Setting this to true or false, shows either Paypal or Card.io logo. 
  My client requires that there should be no logo at all.
  Any help?</p>