title: Trim down OpenCV library
body: <p>I'm developing an android app that uses the OpenCV and Tesseract library. I only use certain functions of these libraries. But with the libraries included, the size of the app grows from 4 to 50mb. </p>
  
  <p>I obviously need to trim down the libraries. How would I do this? </p>
  
  <p>EDIT: To maintain user-friendliness I don't want to use OpenCVManager. I don't want to force the user to install another app.</p>
  
  <p>EDIT2: I need to do the same thing for tesseract libraries. I guess this works in the same way?</p>