[ios] Update tab grid page change histogram expiry

This extends an expired histogram which will be useful
in upcoming tab management work.

Change-Id: I683fb275fbe59e10e06aa878b31cc492bf06d3c0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2579714
Commit-Queue: Ilya Sherman <isherman@chromium.org>
Reviewed-by: Ilya Sherman <isherman@chromium.org>
Auto-Submit: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#835119}

tools/metrics/histograms/histograms_xml/ios/histograms.xml

@@ -839,15 +839,16 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 <histogram name="IOS.StoreKitLoadedSuccessfully" enum="BooleanSuccess"
     expires_after="2021-08-01">
   <owner>mrefaat@chromium.org</owner>
-  <owner>bling-team@google.org</owner>
+  <owner>bling-team@google.com</owner>
   <summary>
     Whether the StoreKit loaded the required iTunes product successfully or not.
   </summary>
 </histogram>
 
 <histogram name="IOS.TabSwitcher.PageChangeInteraction"
-    enum="IOSTabSwitcherPageChangeInteraction" expires_after="M85">
+    enum="IOSTabSwitcherPageChangeInteraction" expires_after="M99">
   <owner>marq@chromium.org</owner>
+  <owner>bling-team@google.com</owner>
   <summary>
     The UI interaction by which the user changed the visible page in the tab
     switcher.