framework: Custom lock screen background [1/2]

Patch Set 1:    * port the custom lock screen feature from
                  ics (http://review.cyanogenmod.org/#/c/16915)

                * thanks to Danny Baumann, who reworked the
                  framework part to work after Jelly Bean 4.2
                  lockscreen changes

Patch Set 2-3:  * remove obsolete files

Patch Set 4-7:  * revert XML changes

Patch Set 8:    * rebased

Change-Id: I800506a9f9e001f659ee29b8b2dbe3464e5198f9

Conflicts:

	policy/src/com/android/internal/policy/impl/keyguard/KeyguardHostView.java
framework: add RAM Bar to Recents

Conflicts:

	core/java/android/provider/Settings.java

Change-Id: If1f3026404b6e77e8e8700bc0d3b4d65a2b0be97

Conflicts:
	core/java/android/provider/Settings.java
	packages/SystemUI/src/com/android/systemui/recent/RecentsPanelView.java

Signed-off-by: crommix <mehmetsanok@gmail.com>