Bulk update metrics expiry

We're still using all metrics for the local search service and auto
screen brightness, which are nearing expiry. This extends them all
to 2021-06-30.

Bug: 1139968, 1139969, 1139970, 1139971, 1139972, 1139973, 1139974, 1139975, 1139976, 1139977, 1139978, 1139979, 1139980, 1139981, 1139991
Change-Id: Iae29437854b38d99e450c48ea6b8f8d783c58d28
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2485994Reviewed-by: Jia Meng <jiameng@chromium.org>
Commit-Queue: Tony Yeoman <tby@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818709}

tools/metrics/histograms/histograms_xml/local/histograms.xml

@@ -48,7 +48,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.Backend" enum="LocalSearchServiceBackend"
-    expires_after="2020-11-30">
+    expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>
@@ -62,7 +62,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.DailySearch" units="count"
-    expires_after="2020-11-30">
+    expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>
@@ -80,7 +80,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.MetricsDailyEventInterval"
-    enum="DailyEventIntervalType" expires_after="2021-04-04">
+    enum="DailyEventIntervalType" expires_after="2021-06-30">
   <owner>jiameng@chromium.org</owner>
   <owner>tby@chromium.org</owner>
   <owner>thanhdng@chromium.org</owner>
@@ -91,7 +91,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.NumberDocuments" units="count"
-    expires_after="2020-11-30">
+    expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>
@@ -106,7 +106,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.NumberResults" units="count"
-    expires_after="2020-11-30">
+    expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>
@@ -119,7 +119,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.ResponseStatus"
-    enum="LocalSearchServiceResponseStatus" expires_after="2020-11-30">
+    enum="LocalSearchServiceResponseStatus" expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>
@@ -132,7 +132,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="LocalSearchService.SearchLatency" units="ms"
-    expires_after="2020-11-30">
+    expires_after="2021-06-30">
 <!-- Name completed by histogram_suffixes name="IndexId" -->
 
   <owner>jiameng@chromium.org</owner>