sepolicy[4/8]: treat fuseblk as sdcard_external

Allow fuse-mounted NTFS/exFAT file systems to be written to

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I1492914dd269a305e27aba58e61064d853adf2bc
Merge "sepolicy[4/8]: treat fuseblk as sdcard_external" into android-4.4