Data Usage Docs in Android 4.0 for Systems Integrators.

Change-Id: I65606843ebe5396037c43cf633a0b8c536bfaa1d
diff --git a/src/tech/sidebar.md b/src/tech/sidebar.md
index 3f81124..c3701fd 100644
--- a/src/tech/sidebar.md
+++ b/src/tech/sidebar.md
@@ -4,3 +4,4 @@
 - [Encryption](/tech/encryption/index.html)
 - [Security](/tech/security/index.html)
 - [Input](/tech/input/index.html)
+- [Data Usage](/tech/datausage/index.html)