Revert "Enable multiuser support (http://forum.xda-developers.com/showthread.php?t=2018146) [2/2]"

This reverts commit 9c5617b8845ac7d6fc698afa09c8db3c96974f26.

Conflicts:
	overlay/frameworks/base/core/res/res/layout-port/keyguard_host_view.xml