Add SDV DataTunnel to visibility list of the Rust wrapper

The SDV DataTunnel uses only Unsynchronized flavor of FMQ which is
already covered in libfmq_rust. Adding SDV DT library to the visibility
list as a temporary workaround until the wrapper will become publicly
available.

Bug: 355058351
Test: m -j
Change-Id: I1f864dcabea2810dc2a7fc7c4c247994ba0b94df
1 file changed