Change DPMS code to accommodate enforce states on boot.

We need to respect if setenforce (selinux enforce), setsebool (booleans),
or setprop (mmac enforce) are set in the any of the init.rc files.
This set of changes will allow the init.rc values to win over any
potential device admin wishes.

Change-Id: I01f2a9084dfe7886087b1497070b0d7f2ad8473e
Signed-off-by: Robert Craig <rpcraig@tycho.ncsc.mil>