Update notes for submitted changes

* IntentService: Fix to run with a lower priority flag.
* Fix one wifi and ethernet concurrency bug
* Prevent MediaScanner infinite loop with invalid path
* FastScroller: Fix to use appropriate index
* FlingTracker can divide by zero and hang StatusBar in an infinite loop
* framework-res: Remove gingerbread scrolls
* use drawable.xml images for buttonpress instead of hardcoding backgrounds