NotificationManager: Concentrate LED light capabilities in a single location

We have a bunch of individual boolean toggles for various LED behaviors
and combinations, which end up getting used as a similarly sprawling bunch
of getResource() calls across various locations. And they keep piling up...

So... create a new overlayable bit field of LED capabilities,
config_deviceLightCapabilities, where we can throw everything
and expand in the future. Remove the obsolete overlays so that
everyone uses the new overlay moving forward.

Change-Id: I7d627914b058861048071fc15776031c4152157f