[2/2] frameworks/base: Add missing quick unlock support

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

Taken from omni and adapted for carbon.

PS3: fixed derp in settings.java
PS4: Updated commit message
Conflicts:

	packages/Keyguard/src/com/android/keyguard/KeyguardAbsKeyInputView.java
        core/java/android/provider/Settings.java

Change-Id: Ic885ddc89761579065d30bb6c3c484402552f76c