[roll] Roll fuchsia [fidl] Land the MonitorAllUpdates fidl changes

Adds a new protocol to the update manager and stubs out all
callers such that they continue to build.

Original-Fixed: 89349

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/611685
Original-Revision: 777491f3fc9e11c40b7fa822ab10839d71e19972
GitOrigin-RevId: 7fcf40b155be12c04e87e98af2fcea0019ada7ef
Change-Id: Idec7631a5ecec83ca2dd0a01985e2bc02b02d874
diff --git a/stem b/stem
index 543ee1e..198884b 100644
--- a/stem
+++ b/stem
@@ -10,7 +10,7 @@
              githooks=""
              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="ff95bfd9a38672caecb31c2a6795a8c874da8a99"/>
+             revision="777491f3fc9e11c40b7fa822ab10839d71e19972"/>
   </projects>
   <hooks>
     <hook name="install-environment"