Use „Changes Frequently“ to split layers

[CryZe]

Currently we always split the timer onto its own layer. Since then we however introduced the same concept for the native renderer where accurate information about whether certain pieces of information change frequently is now part of the layout state. So we can apply the layer split for other components as well and only apply it to the timer when the timer actually changes.

[CryZe]

I'm having trouble getting it working with anything but the timer (I guess we got lucky with that one). While I'm able to separate them onto a separate layer, Chrome still insists on repainting the background and I can't seem to figure out how to get Chrome to stop doing that.