title: Building AOSP and adding a system app with runtime permission
body: <p>I work on Android 6 AOSP. I am able to build add the application as a system app
  but now I want to add runtime permission by default on this system app. Like that the app can start without asking the user to validate the permission.</p>
  
  <p>Do you know how I can do that?</p>
  
  <p>Thanks for you help.</p>