new styles and tab-highlighting to support custom Android Studio site design

Change-Id: I27d11f4526ba79bce8deb5102cc2afbe34a0e116
diff --git a/tools/droiddoc/templates-sdk-dev/assets/js/docs.js b/tools/droiddoc/templates-sdk-dev/assets/js/docs.js
index 18bcd67..60cb860 100644
--- a/tools/droiddoc/templates-sdk-dev/assets/js/docs.js
+++ b/tools/droiddoc/templates-sdk-dev/assets/js/docs.js
@@ -4388,6 +4388,14 @@
       } else if (body.hasClass('downloads')) {
         selected = navEl.find('> li.downloads > a').addClass('selected');
       }
+    } else if (body.hasClass('studio')) {
+      if (body.hasClass('features')) {
+        selected = navEl.find('> li.features > a').addClass('selected');
+      } else if (body.hasClass('guide')) {
+        selected = navEl.find('> li.guide > a').addClass('selected');
+      } else if (body.hasClass('preview')) {
+        selected = navEl.find('> li.preview > a').addClass('selected');
+      }
     } else if (body.hasClass('design')) {
       selected = navEl.find('> li.design > a').addClass('selected');
       // highlight Home nav