Pie: allow pie to be disabled

Change-Id: Ieedfcb5806ac7139a0613690c6a9630a40cb6b3f
Option to use volume keys to control media volume anytime (1/2)

Some users don't adjust ringtone volume often (e.g. only use toggle to
switch between silent and non-silent) mode. Having an option to
use the volume keys to control media volume anytime allows media
volume to be controllled/muted before entering a game or other apps
with sound in an undesirable location.
Fix code alignment
Pie: Add option to change pie's angle from the attach 1/2
Pie: set angle default to 12° (2/2)
Pie Angle: better values and strings
Pie trigger: fix double default
Pie: updates (1/2)
-pie angle: fixes, cleaning and new value (Huge)
-pie size defaults
-strings updates
Pie: set Big as default for item gap (1/2)

Screen: http://goo.gl/aocZ7
Lock screen: Quick Unlock feature (1/2)

Port of QU feature. This one allows to unlock the device from lock screen without pressing the enter button (just enter the pin/password).
Option stored in lock screen settings.

Signed-off-by: Dirk Rettschlag <dirk.rettschlag@gmail.com>
Allow changing auto-brightness responsitivity.
Merge branch 'jellybean' of git://github.com/ParanoidAndroid/android_packages_apps_Settings into jellybean