SystemUI: Fix blank Navring on boot,

Need to setDrawables peeps....

better...

Change-Id: I17b9d1f3652e9dbbb75d4106c6197aaaae35c09e
Port AOKP : Policy: Lockscreen Targets Unlock speed update

Fixes lag on the classic lockscreen targets and sets up a broadcast
receiver to use those methods from outside of policy like navring
example this commit and the future AOKP Ribbon.

Change-Id: I364bf90113d9b274d178c4f7862457eb2490c5e6