[roll] Roll fuchsia [ui][scenic] Avoid copies and lookups in ComputeGlobalHitRegions

This CL eliminates some unnecessary copies and lookups.

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1182432
Original-Revision: bbc87fc13b1b07e9f37211833253b4e76a6c0f30
GitOrigin-RevId: fc5df1514d45c40c2669442a384535e1010bdd73
Change-Id: I7407d5672c49a0f5b51b664c04465a321f83d9d0
diff --git a/stem b/stem
index 7141614..7f0d041 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="339cde02bcfb8066304060d44c2ca8a73547f2fb"/>
+             revision="bbc87fc13b1b07e9f37211833253b4e76a6c0f30"/>
   </projects>
   <hooks>
     <hook name="install-environment"