[4/7] sepolicy: exFAT Support

FUSE based exFAT Implementation

android: https://gerrit.omnirom.org/#/c/4448/
e2fsprogs: https://gerrit.omnirom.org/#/c/3191/
fuse: https://gerrit.omnirom.org/#/c/4443/
vold: https://gerrit.omnirom.org/#/c/4441/
vold: https://gerrit.omnirom.org/#/c/4442/
omni: https://gerrit.omnirom.org/#/c/4449/

Change-Id: I4a7dbccd9e2bb1e48db4c5e4c950fa276af3930b