Lockscreen Blur: fix for coverflows

Change-Id: I668ab36cd846b30cdda1b70e2fca2c512211f72c
Reimplement expanded desktop on top of immersive mode.

Change-Id: I8ed08afebef0bb08a2694b1dbdd6dd1887b5b065
Lockscreen Notifications: fix notifications disappearing on orientation change

Change-Id: I3c2f7ca3ec446c48b471f9c01f7c72284893856e