[4/4] exFAT Support

FUSE based exFAT Implementation

 (1/4) manifest: https://gerrit.slimroms.net/6927
 (2/4) vendor: https://gerrit.slimroms.net/5445
 (3/4) sepolicy (vendor): https://gerrit.slimroms.net/7161
 (4/4) vold: https://gerrit.slimroms.net/6983

Change-Id: If3b7b6fc45fe4fe40989b62721c956a9dd1a6a75