[roll] Roll fuchsia [funnel]: use the ffx discovery lib

Instead of using only the mDNS library, call the generic
wait_for_devices in order to discover targets

Original-Bug: b/316619020
Fix: b/316619020
Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/985192
Original-Revision: 7a2c4e1f20109ed3a635e158ddf1fd84a3e448ae
GitOrigin-RevId: e62568f14c79b5638cca9d3db176f4f1a26fa603
Change-Id: Ic28f3979589a412dc157e5d4062fac2fe5d994e5
diff --git a/stem b/stem
index 84c942c..5296aeb 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="0aaaecb5acf6ebd0f21cafce59fdb5ba46d2af25"/>
+             revision="7a2c4e1f20109ed3a635e158ddf1fd84a3e448ae"/>
   </projects>
   <hooks>
     <hook name="install-environment"