Update with froyo change.

This refers to Froyo as "2.x", because nobody seems to know what the
actual numbering will be.
diff --git a/docs/heap-profiling.html b/docs/heap-profiling.html
index 3c80b4a..a9c949e 100644
--- a/docs/heap-profiling.html
+++ b/docs/heap-profiling.html
@@ -11,6 +11,10 @@
 of the virtual heap.  This is very useful for debugging memory usage
 and looking for memory leaks.  Getting at the information can be tricky,
 but has become easier in recent releases.
+</p><p>
+In what follows, the version number refers to the software release
+running on the phone.  To take advantage of the DDMS integration, you will
+also need a sufficiently recent version of DDMS.
 
 
 <h2>Getting the data</h2>
@@ -148,6 +152,7 @@
 permission, which is required to write data to the SD card.  If you're
 accustomed to writing profile data to <code>/sdcard</code>, you will
 need to enable the permission in your application's manifest.
+</p>
 
 
 <h3>Android 2.0 ("Eclair")</h3>
@@ -157,8 +162,15 @@
 and click the "dump HPROF file" button in the top left.  This always
 writes files to the SD card, so
 you must have a card inserted and the permission enabled in your application.
+</p>
 
 
+<h3>Android 2.x ("Froyo")</h3>
+<p>
+DDMS heap dump requests are now streamed directly out of the VM, removing
+the external storage requirement.
+</p>
+
 <h2>Examining the data</h2>
 <p>
 The data file format was augmented slightly from the common hprof format,