nfctool: sniffer: CONNECT and CC frames tracking

nfctool: sniffer: CONNECT and CC frames tracking

In order to map an SAP with the righ service name, CONNECT and CC frames
need to be tracked along with their dsap/ssap.
When finding an SN, it means a CONNECT frame has been monitored. The SN
string is then associated with the SSAP. Upon CC sniffing, the DSAP is
fetched and if a pending SN for this DSAP is found, the service name
lookup is done.
With this mechanism it is now possible to know the e.g. the Handover SAP
and decode its I frames as pure NDEF ones.
This tracking will only work with connection by name (Which is what the
vast majority of platforms do). An enhancement would be to track SNL
packets as well.