Change requirements for emergency call timeout

Previously if a SIM call manager was set we allowed
emergency calls to timeout if:
  - the device was not in service
  - and the device was connected to Wi-Fi
  - and a connection manager with a emergency capability
    was registered

Unfortunately this prevented scenarios like making an
e911 call over LTE. This CL changes the requirements to
the following:
  - a connection manager with a emergency capability
    is registered
  - and the connection manager was set by the carrier

Bug: 19199181
Bug: 23900801

Change-Id: I8fd05e88e3c02b90170b5809366b71627b2cfbd5