Create client side prefs that extend the service prefs.

vng=r?

I am adding more prefs on the client-side, specifically hardware acceleration.
I have a few reasons for this design, to make the prefs decoupled from context (and Android framework awareness). If the only thing tying a .java file to the Android platform is getting a context in order to call a function, I don't like that design by matter of aesthetics (sorry should word this better). In terms of application vs. activity context, in this case, we can easily ensure that the app context is used for long-lifetime stuff. And finally, why keep passing in the context, when it is only need once, on construction of the singleton, it creates an unnecessary contract on the caller.