[iOS] Extend Breadcrumb expiration dates

ContextMenu historgrams extended to date ~6 months away which is already
used by other ContextMenu histograms.

Bug: 1140065, 1144815
Change-Id: I3f6aaa03a45e3354634ed263d50ec12024b33c8e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2566170
Auto-Submit: Mike Dougherty <michaeldo@chromium.org>
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Cr-Commit-Position: refs/heads/master@{#832163}

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

@@ -2848,7 +2848,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="ContextMenu.DelayedElementDetails"
-    enum="ContextMenuDelayedElementDetails" expires_after="2020-12-11">
+    enum="ContextMenuDelayedElementDetails" expires_after="2021-05-23">
   <owner>michaeldo@chromium.org</owner>
   <owner>src/ios/web/web_state/ui/OWNERS</owner>
   <summary>
@@ -3044,7 +3044,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="ContextMenu.WaitingForElementDetails" enum="BooleanHit"
-    expires_after="2020-12-11">
+    expires_after="2021-05-23">
   <owner>michaeldo@chromium.org</owner>
   <owner>src/ios/web/web_state/ui/OWNERS</owner>
   <summary>

tools/metrics/histograms/histograms_xml/stability/histograms.xml

@@ -474,7 +474,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="Stability.iOS.UTE.OSVersion" enum="VersionComparison"
-    expires_after="2020-12-01">
+    expires_after="2021-05-01">
   <owner>michaeldo@chromium.org</owner>
   <owner>olivierrobin@chromium.org</owner>
   <summary>