input: fix recents opening when waking the device with the home button without lockscreen

Port from ics
http://review.cyanogenmod.com/#/c/18584/

Change-Id: I354ace2a3b37bd336d2806b941f779538bc96c74
power: Add panel auto-brightness configuration

 * Some panel hardware requires that we twiddle some knobs in sysfs to
   enable proper display calibration (gamma, etc) when auto-brightness
   is enabled. Add a configuration value to handle this.

Change-Id: I3c793c3520fc6f9a18d5a3abf1fe0df803c5e580