TF700T: Initial hardware tunables support

* DisplayColorCalibration: Not supported
* VibratorHW: Not supported
* AdaptiveBacklight (NVIDIA SmartDimmer): Supported

Patchset 2: Sync parameters
Patchset 3: Fix permissions and sepolicy
Patchset 4: Rename to AdaptiveBacklight. Move to org.cyanogenmod.hardware package

Depends on http://review.cyanogenmod.org/#/c/48465/
Depends on http://review.cyanogenmod.org/#/c/48467/

Change-Id: I7f75d43aaccf851176e1e2fd77915218c7e10b2f
Signed-off-by: Jorge Ruesga <jorge@ruesga.com>