Change logging to use Java.util.logging

Change logging to use java.util.logging
usgae is based on class names.
You've used `.fine` for `Log.d` and `Log.i` here, in other places you've used `.finer` for `.d` -- is this a typo? It would've been good to see the intended mapping in the description -- there's not enough info there for me to know the intent here.