Docs: Add figure captions to images

Bug: 18334770
Change-Id: I4ed95bb638b6502129d59c099de9a0cd8b16ccb4
diff --git a/src/devices/camera/index.jd b/src/devices/camera/index.jd
index a1e837f..012f989 100644
--- a/src/devices/camera/index.jd
+++ b/src/devices/camera/index.jd
@@ -2,7 +2,7 @@
 @jd:body
 
 <!--
-    Copyright 2013 The Android Open Source Project
+    Copyright 2014 The Android Open Source Project
 
     Licensed under the Apache License, Version 2.0 (the "License");
     you may not use this file except in compliance with the License.
@@ -29,7 +29,10 @@
 The following figure and list describe the components involved and where to find the source for each:
 </p>
 
-<p><img src="images/camera_hal.png"></p>
+<img src="images/camera_hal.png" alt="Android camera architecture" id="figure1" />
+<p class="img-caption">
+  <strong>Figure 1.</strong> Camera architecture
+</p>
 
 <dl>