Revert "From SlimsRom: Frameworks: customizable slim lockscreen background (1/2)"

This reverts commit ee470577e99982593d46a3f090926a4370d6babc.
Lockscreen see through (1/2)

Also add a few missed headers
Fix crash on KeyguardViewManager when lockscreen hasn't been shown

If lockscreen has never appeared (first rom boot), and you enable see
through, you will end up crashing system_server. This fixes it

Patchset 2: fix comment typo
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 8,9:  * rebased

Patch Set 10:   * fix minor code style

Change-Id: I800506a9f9e001f659ee29b8b2dbe3464e5198f9
Lockscreen wallpaper setting

Change-Id: I649ad798642813aec91f696dd8887bd4d6e2b47d
Fix path?