Consolidate flags for displaying metadata

Metadata is now always shown - update code and test data to reflect this.

Bug: 228381885
Test: presubmit
Change-Id: I4fb096c4b0b8dffc488466a53c364b07ffbdff99
diff --git a/testData/lifecycle/docs/reference/androidx/lifecycle/ErrorMessages.html b/testData/lifecycle/docs/reference/androidx/lifecycle/ErrorMessages.html
index 095e40a..bd00d0c 100644
--- a/testData/lifecycle/docs/reference/androidx/lifecycle/ErrorMessages.html
+++ b/testData/lifecycle/docs/reference/androidx/lifecycle/ErrorMessages.html
@@ -5,6 +5,7 @@
 {% include "_shared/_reference-head-tags.html" %}
   </head>
   <body>
+    <div id="metadata-info-block"></div>
     <h1>ErrorMessages</h1>
     <p>
       <pre>public static class <a href="/reference/androidx/lifecycle/ErrorMessages.html">ErrorMessages</a></pre>