BTM_IoCapRsp() function

* Function BTM_IoCapRsp * Description This function is called in response to BTM_SP_IO_REQ_EVT * When the event data io_req.oob_data is set to BTM_OOB_UNKNOWN * by the tBTM_SP_CALLBACK implementation, this function is * called to provide the actual response * Parameters: bd_addr - Address of the peer device * io_cap - The IO capability of local device. * oob - BTM_OOB_NONE or BTM_OOB_PRESENT. * auth_req- MITM protection required or not.