When a phone call is made through the Dialer app in AGL and the call is hung up from the phone, Dialer does not detect that the call was hung up.

The interface stays as it was when the outgoing call was made and the red hang-up button has to be pressed in order to make another call.

Steps to reproduce:

• Boot a regular agl-demo-platform image
• Enable bluetooth
• Pair and connect to a phone over bluetooth
• Initiate a call from AGL Dialer
• Hang up via phone

Expected result:

• Hanging up the call via the phone also ends the call in AGL Dialer