[7/7] omni: 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/4441/
vold: https://gerrit.omnirom.org/#/c/4442/

Change-Id: I45e6a30a5594b3cecba6424e4a932905972f9223
Merge branch 'android-4.4' of https://github.com/omnirom/android_vendor_omni into omni-kk