L2CA_ErtmConnectReq() function

* Function L2CA_ErtmConnectReq * Description Higher layers call this function to create an L2CAP connection. * Note that the connection is not established at this time, but * connection establishment gets started. The callback function * will be invoked when connection establishes or fails. * Parameters: PSM: L2CAP PSM for the connection * BD address of the peer * Enhaced retransmission mode configurations * Returns the CID of the connection, or 0 if it failed to start