docs: final changes to index

Change-Id: I1a9a454937a975f2b2a36ab1132e8bb91dc4059a
diff --git a/docs/html/training/building-wearables.jd b/docs/html/training/building-wearables.jd
index 4fda10e..0745c93 100644
--- a/docs/html/training/building-wearables.jd
+++ b/docs/html/training/building-wearables.jd
@@ -1,5 +1,7 @@
 page.title=Building Apps for Wearables
 page.trainingcourse=true
+page.image=wear/images/notifications.png
+page.metaDescription=Learn how to build notifications, send and sync data, and use voice actions.
 
 @jd:body