PEEK [2/2]
Add ability to switch peek on or off.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>
Change-Id: I1943221aa867099aeed001f3ff54ab83def90391

Conflicts:
src/com/android/settings/DisplaySettings.java
Merge "Update MobileNetworks Icon" into cm-11.0
Bump 3.0
Move Custom progressbar and system animations to Interface
Settings: Halo Color [2/2]
Halo doesn't has Enable/Disable Option here

It can be enable or disable from notification bar so not has sense has a dependency here