frameworks: allow Keyguard package to be defined in overlay

This way, custom keyguards can have their own namespace.

Change-Id: Ia2dfa57652c6f3d3404963897fb2f20a265e5c76
Signed-off-by: Roman Birg <roman@cyngn.com>
frameworks: move keyguard wallpaper to system  (1/2)

Change-Id: I0eb1b5578b705c2ade4c0772fa86e09478b9f73e
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0