Rework Terminator TLV update

Remove the read of NDEF last block.
Remove rw_t2t_read_terminator_tlv_block() as the last block where the
terminator TLV could be written, if enough space, is already saved when
the last NDEF bytes are written. It is updated later after the NDEF
length update.
Remaining bytes after the Terminator TLV within the same block (if any)
are padded with zeros.

Bug: 169640640
Test: Tag R/W
Change-Id: I4bab49ceb5328355bfdd98a56ec006ce18cb1d6b
1 file changed