implement new organization for Training classes
This also moves a few of the documents from API Guides > Best Practices
into the new courses for best practices.
This is also dependent on CL Ieac8a97a8d6fda41a3682241901150cfe16afc4d
which generates the list of classes/lessons on each course landing page.

Change-Id: I8132f72f78d844c3b035c7aa269ad3b88a25d02a
diff --git a/docs/html/training/best-security.jd b/docs/html/training/best-security.jd
new file mode 100644
index 0000000..ddd0cf6
--- /dev/null
+++ b/docs/html/training/best-security.jd
@@ -0,0 +1,9 @@
+page.title=Best Practices for Security & Privacy
+page.trainingcourse=true
+
+@jd:body
+
+
+
+<p>These classes and articles provide information about how to
+keep your app's data secure.</p>
\ No newline at end of file