doc change: Samples browsing: basic support in templates and js/css.

Change-Id: Ie2323f5323c624420c90c8c782b840f183238f7c
diff --git a/tools/droiddoc/templates-sdk/samples_navtree_data.cs b/tools/droiddoc/templates-sdk/samples_navtree_data.cs
new file mode 100644
index 0000000..24ac7b7
--- /dev/null
+++ b/tools/droiddoc/templates-sdk/samples_navtree_data.cs
@@ -0,0 +1,3 @@
+var SAMPLES_NAVTREE_DATA =
+<?cs var:reference_tree ?>
+;