Frameworks: LockBeforeUnlock the new way (1/2)

Due that aosp removed the whole LockBeforeUnlock controll (show slider
lockscreen before an unsecure internal lockscreen) we must try to find another way
without touching the security system itself. Long guess short solution, lmao

here it is, next SlimKat feature

cheers

PatchSet:
- bring eca button to front in lockbeforeunlock mode to make
  it clickable on slider lockscreen

adapted our 4.3 version to 4.4 and smaller fixes/code improvements

Change-Id: I6fa791d7e57b01aaa42a6eca99b07c22e4d83ad8

Conflicts:

	core/java/android/provider/Settings.java

Fix
fb: Keyguard disable challenge drag down on slimpin/simpuk screen

On simpin, simpuck and as well account change screen it does not make
any sense to give the user the abillity to drag down the challenge to show
the widget maximized (neither if widgets are enabled or disabled)
Reason: simpin/simpuck widget is not shown due of security reasons
and on account change the next expected behaviour is that the user gets a new
setup. So it does not make in this case as well sense

Just check for current securityscreen selection to block this behaviour. As
well move the enable/disable code to a proper place

Change-Id: I0b16d1e590252b537d6c71c4aa9b133ed832be45