title: Run flutter app on multiple connected devices/emulators simultaneously
body: <p>How can I run my flutter app on multiple devices at the same time without having to go through the sequential procedure of: select a device -> run, select other device -> run, etc.?</p>
  
  <p>Using:
  Android Studio 3.2.1
  Flutter 1.0.0
  Dart 2.1.0</p>