[roll] Roll fuchsia [service_directory] Use fdio_service_connect

Remove the workaround for components connecting to /svc with rights
introduced in I590583a254b0476408910abfaa23a3050431c528 now that the
tests that required it have been fixed.

Original-Bug: 101092
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/876477
Original-Revision: 640b0ada78615eb53d3862ff2f18a5bf13376a8e
GitOrigin-RevId: f3d0d03341633e466e418cc9018b69f9ae05ae37
Change-Id: I3be9ebb1ca24b46dcc7c3bab624d31ed82c2608f
diff --git a/stem b/stem
index 03a2149..9c22be7 100644
--- a/stem
+++ b/stem
@@ -11,7 +11,7 @@
              githooks="integration/git-hooks"
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="d4014a87096173c2c0d1a856d74bb5f89c909d4a"/>
+             revision="640b0ada78615eb53d3862ff2f18a5bf13376a8e"/>
   </projects>
   <hooks>
     <hook name="install-environment"