am 9f8db94f: am d9544092: Disallow new call addition for live CDMA calls.

            if (call.isEmergencyCall()) {

                // We never support add call if one of the calls is an emergency call.

                return false;

            } else  if (!call.getChildCalls().isEmpty() && !call.can(Connection.CAPABILITY_HOLD)) {

                // This is to deal with CDMA conference calls. CDMA conference calls do not

                // allow the addition of another call when it is already in a 3 way conference.

                // So, we detect that it is a CDMA conference call by checking if the call has

                // some children and it does not support the CAPABILILTY_HOLD

                // TODO: This maybe cleaner if the lower layers can explicitly signal to telecom

                // about this limitation (b/22880180).

                return false;

            } else if (call.getParentCall() == null) {

                count++;

            }