Update notes for submitted changes

* Fix a bootloop problem when /data/system/usagestats/usage-history.xml is empty. This often occurs after an incomplete reboot/shutdown or battery pull.
* Call to equals() comparing different types (FindBugs)
* MiniThumbFile: Fix image/bitmap retrieval
* Rework thumbnail handling
Update notes for submitted changes

* Memory leak in IInputMethodSessionWrapper executeMessage