Add the missing version number comment for AndroidPolicyWriter

grit/format/policy_templates/writers/android_policy_writer.py

Index: grit/format/policy_templates/writers/android_policy_writer.py
diff --git a/grit/format/policy_templates/writers/android_policy_writer.py b/grit/format/policy_templates/writers/android_policy_writer.py
index 5d8cbef38f991b2964d15d36ce6f6e3b45133072..8cc447d01333699978312e965e68a878e269e1ab 100644
--- a/grit/format/policy_templates/writers/android_policy_writer.py
+++ b/grit/format/policy_templates/writers/android_policy_writer.py
@@ -88,6 +88,9 @@ class AndroidPolicyWriter(xml_formatted_writer.XMLFormattedWriter):
   def BeginTemplate(self):
     comment_text = 'DO NOT MODIFY THIS FILE DIRECTLY!\n' \
                    'IT IS GENERATED FROM policy_templates.json.'
+    if self._GetChromiumVersionString():
+      comment_text += "\n" + self.config["build"] + " version: "\
+                   + self._GetChromiumVersionString()
     comment_node = self._doc.createComment(comment_text)
     self._doc.insertBefore(comment_node, self._resources)