Prevent integer underflow in rw_t2t_handle_tlv_detect_rsp() Bug: 121035711 Test: NFC Enable/Disable Change-Id: Ifa3e5fdf23f267a0d6c3aa8495c4c83f20153025 (cherry picked from commit 83439b5ca03c9a52ddbf9d9a033c18d9e456a97b)