overlay: Disable Screen-off animation until it works

Change-Id: I0a238bed4a2e0f9f813091e8e4dd060ae6524a08
Merge "overlay: Disable Screen-off animation until it works" into cm-10.1
Revert "backlight: fix backlight sysfs references"

This reverts commit 125a125f7710900b427fe8ae7fbeda75a27f29d7.

Change-Id: If01ebf738fabb1d9404f6fac918cbb1b34f346b9
Merge remote-tracking branch 'cm/cm-10.1' into cm-10.1