[roll] Roll fuchsia [virtualization] Update GuestVsockAcceptor to take a socket

The vsock device only supports sockets anyway, not channels. This only
updates the existing C++ device and unit test enough so that they
compile (the test still converts sockets to handles in some places),
since both are being deprecated.

We'll do the same for HostVsockConnector in a separate CL.

Original-Bug: 97355
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/676666
Original-Revision: 1d79e7d916b735a86556eef74d38485c4387e95f
GitOrigin-RevId: 0698d835cb51ddf5445d8831e6aa70fc119d1e3b
Change-Id: I70a8c0f267c0afa6ac6f603f22f293ee4d1cfb1c
diff --git a/stem b/stem
index ac2ec18..052e7ce 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="15f798ea226e4d61f3ac8a1eb4466034fe54aa89"/>
+             revision="1d79e7d916b735a86556eef74d38485c4387e95f"/>
   </projects>
   <hooks>
     <hook name="install-environment"