[2/2] frameworks/base: Enable quick unlock

Automatically unlock the lockscreen when the correct pin/password is keyed.

- public static final String LOCKSCREEN_QUICK_UNLOCK_CONTROL = "lockscreen_quick_unlock_control" is already defined in Settings.java (line 3280)

Change-Id: I3c1df4b573321a9343d1c339055577d5ca737f14