transitive dependencies not working for card.io and aar library using gradle

Hi Im using transitive dependency for card.io to aar library using gradle. But its throwing class not found exception from the application to card.io.
Is it possible to add an aar into another aar. I want to bundle both aar libraries into one and ship it to other users. I there a way to do this?
I have followed followed many links but the mentioned solutions are not working for my application. Application is working, when the card.io library directly importing to the working application.