Revert "Reimplement expanded desktop on top of immersive mode."

This reverts commit e705f1d79b639688019b7a3ea9093db7d99871f7.

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
Revert "Fix profile lockscreen override."

This reverts commit 7827327cfe804e2f863d4f08e934ffd06213de8b.
Revert "Fix indention."

This reverts commit 51ab82a180d8e0f4d521d80c57ed5ab3c6a5bd0b.