Add Write Single Block poller functions for ISO 15693-3 and SLIX/SLIX2,
enable the Write scene for both protocols, and skip blocks that already
contain the correct data to minimise RF session time and avoid timeouts
on large tags (e.g. 80-block ICODE SLIX2).
Tested on NXP ICODE SLIX2 (UID E0 04 01 09 05 05 09 37, 80 x 4 byte blocks).
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