Lockscreen shortcuts: Fix icon pack usage

Change-Id: I1497cece97f90c76c3930a3a004a2d40416e13ed
Center Lockscreen targets

Change-Id: If99b0b7bf7ac4507076b9806e8208bab77fb71a2
Signed-off-by: iceandfire <arhamjamal@gmail.com>

Conflicts:
	res/layout/lockscreen_targets.xml