Settings : Port lockscreen shortcut configuration

Port lockscreen configuration from cm-10.2

Modify for AICP source

Change-Id: Ib4fd41f747912cc741eca1983c5f56df56176aad
Lockscreen shortcuts: Fix icon pack usage

Change-Id: I1497cece97f90c76c3930a3a004a2d40416e13ed
Center Lockscreen targets

Change-Id: If99b0b7bf7ac4507076b9806e8208bab77fb71a2
Add icon for Lockscreen targets From AICP - by n3ocort3x

Change-Id: Ied731b924d48c3e038ed12faf6da9a63bbdd211b