selinux: Don't reset inherited system-wide configs

Change-Id: I0d93bec34fdedf6c7d05e98a384b6718d602c2e7
(cherry picked from commit 514d7594f79b791429a721eda685cb3ec36b9c20)

Conflicts:
	BoardConfig.mk
Revert "Enable smart cover feature"

This reverts commit 7bd1050248ce39804f1fcad356a6c120e0116b4d.

(cherry picked from commit 86e98b2ef0ab3aaf297324e2db67f36df0894ceb)