[roll] Roll fuchsia [power] Add and implement SuspendBlocker API.

- Adds RegisterSuspendBlocker function to
fuchsia.power.system.ActivityGovernor.
- Adds supporting types for SuspendBlocker: states, errors, etc.
- Adds version attributes for inclusion in the next SDK release.
- Deprecates RegisterListener. Updates use of @deprecated tag.
- Adds test cases.

Original-Bug: 400488262
Test: fx test system-activity-governor-test

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1222925
Original-Revision: ac511e80679ffdf57cde25806732141f9ce84db1
GitOrigin-RevId: 858625445b9e1d4c9f47db249b9e92b7576076de
Change-Id: I921b23e5da1809e1352964211824d057606e21c8
diff --git a/stem b/stem
index 760d93e..6a15a9a 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="5bb5ec1438a68de1a16cabb58865a814c75ab66e"
+             revision="ac511e80679ffdf57cde25806732141f9ce84db1"
              />
   </projects>
   <hooks>