title: Android APK Auto Update
body: <p>I would like to know if this is possible.
  Our users download &amp; install APK from Play market the first time,
  and afterward while the application detected that a new version is available, it can auto download &amp; install new APK (using the same signature as original one) from our custom server, even if the allow side-loading setting is unchecked in user's device?</p>
  
  <p>Or we must upload the new update APK on Play market again, and let user manually download &amp; install from market?</p>
  
  <p>thanks.</p>