Clean up support library samples.

Move them off into their own directory, so it is less confusing to
find them.

Also put in some additional samples -- throttle and arguments.

And add some docs.

Change-Id: I221e56c7ff203934796979bb5ed7ab8835f84b83
diff --git a/samples/ApiDemos/_index.html b/samples/ApiDemos/_index.html
index 399ef86..ffe5db5 100644
--- a/samples/ApiDemos/_index.html
+++ b/samples/ApiDemos/_index.html
@@ -37,7 +37,8 @@
 "    <li><a href='src/com/example/android/apis/media/index.html'>Media</a></li>"+
 "    <li><a href='src/com/example/android/apis/os/index.html'>OS</a></li>"+
 "    <li><a href='src/com/example/android/apis/text/index.html'>Text</a></li>"+
-"    <li><a href='src/com/example/android/apis/view/index.html'>Views</a></li></ul>");
+"    <li><a href='src/com/example/android/apis/view/index.html'>Views</a></li></ul>"+
+"    <li><a href='src/com/example/android/apis/support/index.html'>Static Support Library</a></li>");
 
 }