Make surfaceflinger domain enforcing.

Change-Id: I55d059cf6b9e13a81545d3d8b8ff86befc89d6b3
Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov>

surfaceflinger.te

 # surfaceflinger - display compositor service
 type surfaceflinger, domain;
-permissive surfaceflinger;
 type surfaceflinger_exec, exec_type, file_type;
 
 init_daemon_domain(surfaceflinger)