Highlight "Preview" subtab on preview pages. Support templating for ndk files within templates-sdk.

Change-Id: Iade5ac4630c9e763c377ab5749f16832e3ba47b7
diff --git a/tools/droiddoc/templates-sdk/docpage.cs b/tools/droiddoc/templates-sdk/docpage.cs
index 3af7049..d69023f 100644
--- a/tools/droiddoc/templates-sdk/docpage.cs
+++ b/tools/droiddoc/templates-sdk/docpage.cs
@@ -6,25 +6,30 @@
 
 <?cs # add document classes for navigation header selection (and other stuff) ?>
 <?cs
-if:(google || reference.gms || reference.gcm) ?>google <?cs
-/if ?><?cs
-if:(guide||develop||training||reference||tools||sdk||google||samples||preview) ?>develop<?cs
-  if:guide ?> guide<?cs /if ?><?cs
-  if:samples ?> samples<?cs /if ?><?cs
-  if:preview ?> preview<?cs /if ?><?cs
-elif:(distribute||googleplay||essentials||users||engage||monetize||disttools||stories)
-  ?>distribute<?cs
-  if:googleplay ?> googleplay<?cs /if ?><?cs
-  if:essentials ?> essentials<?cs /if ?><?cs
-  if:users ?> users<?cs /if ?><?cs
-  if:engage ?> engage<?cs /if ?><?cs
-  if:monetize ?> monetize<?cs /if ?><?cs
-  if:disttools ?> disttools<?cs /if ?><?cs
-  if:stories ?> stories<?cs /if ?><?cs
-elif:(about||wear||tv||auto) ?>about<?cs
-elif:design ?>design<?cs
-/if ?><?cs
-if:page.trainingcourse ?> trainingcourse<?cs
+  if:(google || reference.gms || reference.gcm) ?>google <?cs /if ?><?cs
+  if:ndk ?>ndk<?cs
+    if:guide ?> guide<?cs /if ?><?cs
+    if:samples ?> samples<?cs /if ?><?cs
+    if:reference ?> reference<?cs /if ?><?cs
+    if:downloads ?> downloads<?cs /if ?><?cs
+  else ?><?cs
+    if:(guide||develop||training||reference||tools||sdk||google||samples||preview) ?>develop<?cs
+      if:guide ?> guide<?cs /if ?><?cs
+      if:samples ?> samples<?cs /if ?><?cs
+      if:preview ?> preview<?cs /if ?><?cs
+    elif:(distribute||googleplay||essentials||users||engage||monetize||disttools||stories||analyze) ?>distribute<?cs
+      if:googleplay ?> googleplay<?cs /if ?><?cs
+      if:essentials ?> essentials<?cs /if ?><?cs
+      if:users ?> users<?cs /if ?><?cs
+      if:engage ?> engage<?cs /if ?><?cs
+      if:monetize ?> monetize<?cs /if ?><?cs
+      if:disttools ?> disttools<?cs /if ?><?cs
+      if:stories ?> stories<?cs /if ?><?cs
+      if:analyze ?> analyze<?cs /if ?><?cs
+    elif:(about||wear||tv||auto) ?>about<?cs
+    elif:design ?>design<?cs
+    /if ?><?cs
+    if:page.trainingcourse ?> trainingcourse<?cs /if ?><?cs
 /if ?>" itemscope itemtype="http://schema.org/Article"><?cs
 include:"header.cs" ?>