Populate sni and uaid in GfeTlsServerStream This allows enabling TLS in more tests in //gfe/gfe2/quic:end_to_end_test gfe-relnote: protected by quic version flags draft_27 and draft_25 PiperOrigin-RevId: 301412547 Change-Id: I3d8fc201ad5a982871f24954c9dfdbab5364edcd