Docs: Reinstating missing 5.0 security enhancements

Bug: 18121650
Change-Id: Icdb0b929a483dea3a7b0110b01e691cac9320169
diff --git a/src/devices/devices_toc.cs b/src/devices/devices_toc.cs
index 69ab767..8a5353f 100644
--- a/src/devices/devices_toc.cs
+++ b/src/devices/devices_toc.cs
@@ -280,6 +280,7 @@
               </a>
             </div>
             <ul>
+              <li><a href="<?cs var:toroot ?>devices/tech/security/enhancements50.html">Android 5.0</a></li>
               <li><a href="<?cs var:toroot ?>devices/tech/security/enhancements44.html">Android 4.4</a></li>
               <li><a href="<?cs var:toroot ?>devices/tech/security/enhancements43.html">Android 4.3</a></li>
               <li><a href="<?cs var:toroot ?>devices/tech/security/enhancements42.html">Android 4.2</a></li>