BTM_CreateSco() function

* Function BTM_CreateSco * Description This function is called to create an SCO connection. If the * "is_orig" flag is TRUE, the connection will be originated, * otherwise BTM will wait for the other side to connect. * NOTE: If BTM_IGNORE_SCO_PKT_TYPE is passed in the pkt_types * parameter the default packet types is used. * Returns BTM_UNKNOWN_ADDR if the ACL connection is not up * BTM_BUSY if another SCO being set up to * the same BD address * BTM_NO_RESOURCES if the max SCO limit has been reached * BTM_CMD_STARTED if the connection establishment is started. * In this case, "*p_sco_inx" is filled in * with the sco index used for the connection.