Extend expiration date for UserEligibility histograms

Bug: 1228295
Change-Id: I740a4546fd55966422505e76bd3fc45a8a6c8b6f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3097098
Reviewed-by: Josh Simmons <jds@google.com>
Reviewed-by: Weilun Shi <sweilun@chromium.org>
Commit-Queue: Basia Zimirska <basiaz@google.com>
Cr-Commit-Position: refs/heads/master@{#912469}

tools/metrics/histograms/metadata/assistant/histograms.xml

@@ -259,7 +259,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Assistant.VoiceSearch.UserEligibility.FailureReason{Timing}"
-    enum="EligibilityFailureReason" expires_after="2021-08-22">
+    enum="EligibilityFailureReason" expires_after="2022-08-22">
   <owner>wylieb@chromium.org</owner>
   <owner>fgorski@chromium.org</owner>
   <owner>jds@google.com</owner>
@@ -280,7 +280,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Assistant.VoiceSearch.UserEligibility{Timing}"
-    enum="BooleanEligible" expires_after="2021-08-22">
+    enum="BooleanEligible" expires_after="2022-08-22">
   <owner>wylieb@chromium.org</owner>
   <owner>fgorski@chromium.org</owner>
   <owner>jds@google.com</owner>