Lockscreen: See through (1/2)

Add the ability to see through lockscreen.
Adapted to kitkat from jellybean by @BigBrother1984

Signed-off-by: D4rKn3sSyS <jesdga95@gmail.com>
Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS2:

* Adding missing sem-colon.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Change-Id: I9057a6e302a5a824799844f27e8f64ff677a520a

PS3:

* Replace and remove undefined mContext.
* Define the boolean enableScreenRotation inside new method.
* Whitespaces clean up.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS4:

* Restore mContext in setKeyguardParams().

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS5:

* Fixes for setKeyguardParams() and maybeCreateKeyguardLocked() methods, kitkat changed some things.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS6:

* Missing sem-colon.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS7: Fix all the things.

* Effects doesn't vanish after first unlock.
* Created condition in updateShowWallpaper() method that just return if see through is activated, he was restoring the wallpaper at second lock.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS8: Cosmetic changes.

* Correct java style name to seeThrough() and place it above updateShowWallpaper().

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS9: Other cosmetic changes.

* Better name to the see through boolean.
* Removed a space nitpick.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

PS10:

* We had two booleans for the same thing, ditch the one defined in one class only and take the global.

Signed-off-by: Carlo Savignano <stevewatersy@gmail.com>

Change-Id: I06d952f85baf284961a24c8c9f90b29f4aef719a

Conflicts:
	core/java/android/provider/Settings.java
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java