Merge analaytics from docs site and flutter.io site. (#24825)

diff --git a/dev/docs/analytics.html b/dev/docs/analytics.html
index c3c1f30..ee11d34 100644
--- a/dev/docs/analytics.html
+++ b/dev/docs/analytics.html
@@ -4,6 +4,6 @@
   m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)
   })(window,document,'script','//www.google-analytics.com/analytics.js','ga');
 
-  ga('create', 'UA-67589403-2', 'auto');
+  ga('create', 'UA-67589403-1', 'auto');
   ga('send', 'pageview');
 </script>