title: Android How can app run as System App?
body: <p>What is required for an app to run as a System app?  What needs to be requested from the device vendor?  Does the process change if the device is rooted and the app is to call a method on <code>PowerManager</code> or other system management classes that affect the device?  </p>
  
  <p>I am able to call to set brightness but not do operations like put the device in sleep mode etc. </p>