aries-common: use mtp instead mass storage

actually mass storage isn't supported on omnirom
so set mtp as well and get internal|external auto mounts

Signed-off-by: Humberto Borba <humberos@gmail.com>
Change-Id: I7d7354c12f04d4e65e78f60951a161c4745b9de1
Merge "aries-common: use mtp instead mass storage" into android-4.4