BTM_BleSetPrefConnParams() function

* Function BTM_BleSetPrefConnParams * Description Set a peripheral's preferred connection parameters. When * any of the value does not want to be updated while others * do, use BTM_BLE_CONN_PARAM_UNDEF for the ones want to * leave untouched. * Parameters: bd_addr - BD address of the peripheral * min_conn_int - minimum preferred connection interval * max_conn_int - maximum preferred connection interval * slave_latency - preferred slave latency * supervision_tout - preferred supervision timeout * Returns void