Settings : Port lockscreen shortcut configuration

    Ported to AOSPA from N5X CM11 Based by @AragaoAnderson

Port lockscreen configuration from cm-10.2

Change-Id: I3897d73e8b65070e5e6477aa91b3e4e54858f205
Add back navigation ring customization.

    Ported to AOSPA from N5X CM11 Based by @AragaoAnderson

Original commit: https://github.com/CyanogenMod/android_packages_apps_Settings/commit/ab99452d34b8ce4f73cfa2365422ea0507ce6552

Change-Id: I10e98651fefccd883a16eab404b088f1d3c3c5b0
Lockscreen shortcuts: Fix icon pack usage

Change-Id: I1497cece97f90c76c3930a3a004a2d40416e13ed
Settings: cLock Settings

    Ported to AOSPA from N5X CM11 Based by @AragaoAnderson

Squashed commits:

Settings: Add cLock settings back to lockscreen settings

Change-Id: I0d3b7b2c004da735b79dba211c8965b42edef3b8
Settings: remove preference if device hasn't LockClock installed