title: How to simulate network delay on android emulator?
body: <p>For example:</p>
  
  <p>sending "A" from app to sever takes 5 seconds.
  Sever responds with "B" which takes 15 seconds to arrive at the app.
  In adb, we can add a network delay of 5000 and delay only the outgoing traffic for 5 seconds but how can I delay the incoming traffic for 15 seconds?</p>