title: What is the difference between privapp-permissions.xml in system/etc/permissions and default-permissions.xml in system/etc/default-permissions?
body: <p>What is the difference between privapp-permissions.xml in system/etc/permissions and default-permissions.xml in system/etc/default-permissions?</p>
  
  <p>For refernce: <a href="https://github.com/opengapps/opengapps/issues/518#issuecomment-355230967" rel="nofollow noreferrer">https://github.com/opengapps/opengapps/issues/518#issuecomment-355230967</a></p>
  
  <p>The link didn't understand properly.</p>