title: How to set the status bar color in the whole device to green as the default phone app does?
body: <p>I'm making an app that can place and receive VoIP voice calls. As I want to mimic the default phone behavior, I want to do the same the system does when having a phone call: painting the status bar green while having a call, to highlight the user that he's on a call.</p>
  <p>Just to clarify to avoid being marked as duplicated: this question is related to changing the status bar color not just in our Activity but in the whole device, as some phones when in a call.</p>
  <p>Is it possible to achieve it?</p>