[TTS] Extend expiry of two CardTag histograms.

Extends the expiry of two histograms that we expect to be critical
in the Longpress and Translation experiments.

BUG=1053120

Change-Id: If9bfaa1defc88ed1bb5e6b3d5e6ac47bbe93c35a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2063357
Auto-Submit: Donn Denman <donnd@chromium.org>
Reviewed-by: Robert Kaplow <rkaplow@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743180}

tools/metrics/histograms/histograms.xml

@@ -139655,7 +139655,7 @@ should be kept until we remove incident reporting. -->
 </histogram>
 
 <histogram name="Search.ContextualSearch.CardTag"
-    enum="ContextualSearchCardTag" expires_after="M82">
+    enum="ContextualSearchCardTag" expires_after="M85">
   <owner>donnd@chromium.org</owner>
   <owner>twellington@chromium.org</owner>
   <summary>
@@ -139667,7 +139667,7 @@ should be kept until we remove incident reporting. -->
 </histogram>
 
 <histogram name="Search.ContextualSearch.CardTagSeen"
-    enum="ContextualSearchCardTag" expires_after="M82">
+    enum="ContextualSearchCardTag" expires_after="M85">
   <owner>donnd@chromium.org</owner>
   <owner>twellington@chromium.org</owner>
   <summary>