Screen on/off animation tweaks

- Pass to surface flinger whether we want animations or not.
- Don't use the animation when the screen goes off because of the prox sensor.
- Turn the screen-on animation back off
- Also, now the animation setting controls whether or not we do the animation.

Bug: 3097475
Bug: 3098508
Change-Id: I205d5564d6668b33a8dc1c40d8cc06c4aad305cf