[5/7] vold: 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/
sepolicy: https://gerrit.omnirom.org/#/c/4444/
vold: https://gerrit.omnirom.org/#/c/4442/
omni: https://gerrit.omnirom.org/#/c/4449/

Change-Id: I4221ec183d4e7615afaf8d97f23514bf67f908da