Doc change: updated images, landings, and ndk updates.

Change-Id: If128f8394438471365db6f7c0a42e6b38d25d250
diff --git a/docs/html/guide/index.jd b/docs/html/guide/index.jd
index b27acbf..1c124aa 100644
--- a/docs/html/guide/index.jd
+++ b/docs/html/guide/index.jd
@@ -18,9 +18,9 @@
 the following fundamental concepts about the Android app framework:</p>
 
 
-<div class="landing-banner">
-
-<div class="col-6">
+<div class="wrap">
+  <div class="cols">
+    <div class="col-1of2">
 
 <h4>Apps provide multiple entry points</h4>
 
@@ -45,7 +45,7 @@
 </div>
 
 
-<div class="col-6">
+<div class="col-1of2">
 
 <h4>Apps adapt to different devices</h4>
 
@@ -69,7 +69,8 @@
 
 </div>
 
-</div><!-- end landing-banner -->
+</div>
+</div>