Histograms: Extend OOBE related histograms

Fixed: 1117091, 1117092, 1117093
Change-Id: I5d495e7bd95c591ba2281429106e87caa0a9a3de
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2440628
Commit-Queue: Roman Aleksandrov <raleksandrov@google.com>
Reviewed-by: Roman Sorokin [CET] <rsorokin@chromium.org>
Reviewed-by: Mark Pearson <mpearson@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812841}

tools/metrics/histograms/histograms_xml/oobe/histograms.xml

@@ -40,7 +40,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="OOBE.ErrorScreensTime.Enrollment" units="ms"
-    expires_after="2020-10-01">
+    expires_after="2021-08-01">
   <owner>raleksandrov@google.com</owner>
   <owner>cros-oac@google.com</owner>
   <summary>
@@ -56,7 +56,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="OOBE.ErrorScreensTime.Supervised" units="ms"
-    expires_after="2020-10-01">
+    expires_after="2021-08-01">
   <owner>raleksandrov@google.com</owner>
   <owner>cros-oac@google.com</owner>
   <summary>
@@ -344,7 +344,7 @@ reviews. Googlers can read more about this at go/gwsq-gerrit.
 </histogram>
 
 <histogram name="OOBE.UpdateScreen.UpdateDownloadingTime" units="ms"
-    expires_after="2020-10-01">
+    expires_after="2021-08-01">
   <owner>raleksandrov@google.com</owner>
   <owner>cros-oac@google.com</owner>
   <summary>