[Android] Increase expiry of Signin.SyncFirstSetupCompleteSource

Increase the expiry of the histogram to M89

Bug: 1138396
Change-Id: I9690dbd9d90281ab59b144bc8670f547778c7f64
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2470880
Commit-Queue: Alexei Svitkine <asvitkine@chromium.org>
Reviewed-by: Alexei Svitkine <asvitkine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#817571}

tools/metrics/histograms/histograms_xml/signin/histograms.xml

@@ -1017,7 +1017,7 @@ kept as long as profile signout is possible -->
 </histogram>
 
 <histogram name="Signin.SyncFirstSetupCompleteSource"
-    enum="SyncFirstSetupCompleteSource" expires_after="M87">
+    enum="SyncFirstSetupCompleteSource" expires_after="M89">
   <owner>triploblastic@chromium.org</owner>
   <owner>bsazonov@chromium.org</owner>
   <summary>Tracks where FirstSetupComplete bit is set from.</summary>