Extend the lifetime of AccessContextAudit histograms to M93

Bug: 1153758
Change-Id: Ied62101dc6458c883380cbba0235c37a54464584
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2565426Reviewed-by: Theodore Olsauskas-Warren <sauski@google.com>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Martin Šrámek <msramek@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832368}

tools/metrics/histograms/histograms_xml/others/histograms.xml

@@ -11426,7 +11426,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Privacy.AccessContextAudit.CookieDomainCount" units="units"
-    expires_after="M89">
+    expires_after="M93">
   <owner>msramek@chromium.org</owner>
   <owner>sauski@google.com</owner>
   <summary>
@@ -11437,7 +11437,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Privacy.AccessContextAudit.DatabaseSize" units="KiB"
-    expires_after="M89">
+    expires_after="M93">
   <owner>msramek@chromium.org</owner>
   <owner>sauski@google.com</owner>
   <summary>
@@ -11448,7 +11448,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Privacy.AccessContextAudit.RecordCount" units="units"
-    expires_after="M89">
+    expires_after="M93">
   <owner>msramek@chromium.org</owner>
   <owner>sauski@google.com</owner>
   <summary>
@@ -11459,7 +11459,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Privacy.AccessContextAudit.StorageOriginCount" units="units"
-    expires_after="M89">
+    expires_after="M93">
   <owner>msramek@chromium.org</owner>
   <owner>sauski@google.com</owner>
   <summary>
@@ -11470,7 +11470,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Privacy.AccessContextAudit.TopFrameOriginCount" units="units"
-    expires_after="M89">
+    expires_after="M93">
   <owner>msramek@chromium.org</owner>
   <owner>sauski@google.com</owner>
   <summary>