Wrong handing of incoming CANCEL

[atsakiridis]

Scenario:

• Web Olympus calls Android Olympus and cancels call
• Android sends 200 OK to the CANCEL
• Android sends 487 Request Terminated
  At that point and after 487, Android should receive ACK but seems that its not. On RC side seems that the ACK is sent thought. Need to investigate

Here's logcat, and here's RC logs

[atsakiridis]

Btw assigning to next sprint for now as it isn't critical