[roll] Roll fuchsia [spmi][testing] mock-spmi supports multiple watch expectations

Test: run through CQ and doesn't break existing tests with mock-spmi

Original-Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1275174
Original-Revision: 13f3d6579d1ba6f9b0407c880e616ef105546e55
GitOrigin-RevId: 036e970a826aab53aa748b430be032ef6ceae841
Change-Id: I54059250c9aac16dfe219ed8cf62f3aaffe67a9d
diff --git a/stem b/stem
index 0a218c8..c8035ba 100644
--- a/stem
+++ b/stem
@@ -8,7 +8,7 @@
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              remote="https://fuchsia.googlesource.com/fuchsia"
              gerrithost="https://fuchsia-review.googlesource.com"
-             revision="bdf9dfaf1089f2cd0c924af7e4d233b7c66d5df0"
+             revision="13f3d6579d1ba6f9b0407c880e616ef105546e55"
              />
   </imports>
   <projects>