docs: add 'reference' class for use with 'special' to refine the headings
used within the 'special' div when in the reference.

Change-Id: Iebf84484e2eda104b2247aefc5a539f2a62c5102
diff --git a/tools/droiddoc/templates-sdk/assets/android-developer-docs.css b/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
index 3af4eb1..20871b9 100644
--- a/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
+++ b/tools/droiddoc/templates-sdk/assets/android-developer-docs.css
@@ -718,6 +718,17 @@
   padding:0;
 }
 
+#jd-content div.special.reference h2,
+#jd-content div.special.reference h3,
+#jd-content div.special.reference h4 {
+  color:#000;
+  font-size:1em;
+  border:none;
+  font-weight:bold;
+  margin:.5em 0;
+  padding:0;
+}
+
 p.note, div.note,
 p.caution, div.caution,
 p.warning, div.warning {