When vold mounts an ext4 sdcard, it needs to force the context to
sdcard_external.
avc: denied { relabelfrom } for pid=190 comm=vold scontext=u:r:vold:s0 tcontext=u:object_r:labeledfs:s0 tclass=filesystem
avc: denied { relabelto } for pid=190 comm=vold scontext=u:r:vold:s0 tcontext=u:object_r:sdcard_external:s0 tclass=filesystem
avc: denied { relabelfrom } for pid=190 comm=vold scontext=u:r:vold:s0 tcontext=u:object_r:sdcard_external:s0 tclass=filesystem
Change-Id: I80f42fbdf738dee10958ce1bdc1893a41234f0d9
This is required for ASEC support. Vold can already create and
access directories, but do not yet have the permission for files.
Change-Id: I5082bbff692e5dc53c7000e4b3a293e42d33f901
