Keaguard: enable translucent keyguard by default

currently it is possible to enable it per device over an overlay and it is disabled
by default. Enable it by default but respect general transluscent disable from
device tree. Manta eg disables this feature due of graphical glichtes.

Change-Id: I3579d47ee3bee05719ef357ffcf19c0137b2302f
Partly fix lockscreen blur rotation issue

This works very well when changing rotation from portrait to landscape and vice versa but doesn't work when changing rotation from landscape to landscape (90 to 270 deg) or portrait to portrait (0 to 180 deg) because we don't get notified of such changes.

Change-Id: Id4d9b4a6ce061fdb4767a8cb12dd7a8d33c99175

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Keyguard: smooth background change derp fixes

no idea how this could happened. Cleanup, fixes and updates (thanks kyril)

Change-Id: I0296a1d0d7df3dc68c2fde34584ed8c46eef57f3

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Custom lockscreen wallpaper [1/2]

Conflicts:

	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	packages/Keyguard/src/com/android/keyguard/KeyguardViewMediator.java
	policy/src/com/android/internal/policy/impl/keyguard/KeyguardServiceWrapper.java

Change-Id: I6b0cd091f5d3c14d267921c047f0308929fe7cf2

Custom Wallpaper: use PNG and fix derp

This should fix the bad lockscreen wallpaper quality after reboot.

Change-Id: Iff461b109f79cf99fa99a7ab89ad57864c8a0dbc

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
	services/java/com/android/server/power/DisplayPowerController.java

Conflicts:
	packages/Keyguard/src/com/android/keyguard/KeyguardViewManager.java
Re-Keyguard: smooth background change.

Change-Id: Ia0e4d0000db72b5cdb6fede03791805e34fa311d

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