Keyguard: Implement quick unlock feature [2/2]

* Rework for lollipop.
* See frameworks for description https://gerrit.paranoidandroid.co/#/c/57/
* The option is showed in Security settings only when lock type
  is PIN or Password. Will not apply to SIM PIN.

Signed-off-by: @BigBrother1984 <carlosavignano@aospa.co>
Change-Id: I3d2d15e610796662fd04588430c657d6ef1a9631
Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	res/values/pa_strings.xml