Docs: Add TOC page for Wearable samples

Change-Id: I0fdf412f20fb2a45c34c9700ed1ca9446cfc6ff3
diff --git a/Android.mk b/Android.mk
index 22cc27b..b77c2ed 100644
--- a/Android.mk
+++ b/Android.mk
@@ -737,7 +737,8 @@
                  -samplegroup Sensors \
                  -samplegroup Testing \
                  -samplegroup UI \
-                 -samplegroup Views
+                 -samplegroup Views \
+                 -samplegroup Wearable
 
 ## SDK version identifiers used in the published docs
   # major[.minor] version for current SDK. (full releases only)