Extend expiry of hotseat transition animation histograms

Bug: 1123585
Change-Id: Ib78099d248720689054bb4d24c81bf2022af36bb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2510691Reviewed-by: Brian White <bcwhite@chromium.org>
Commit-Queue: Ana Salazar <anasalazar@chromium.org>
Cr-Commit-Position: refs/heads/master@{#823365}

tools/metrics/histograms/histograms_xml/ash/histograms.xml

@@ -705,7 +705,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram base="true" name="Ash.HotseatTransition.AnimationSmoothness"
-    units="%" expires_after="2020-10-11">
+    units="%" expires_after="2021-10-11">
 <!-- Name completed by histogram suffixes
      name="HotseatTransitionType" -->