blkid: Correct the label name for exfat

Volume label name is 16 bit unicode string according to spec.
Currently blkid labels the device without converting it to
utf-8 chars due to which incorrect label is displayed.

Bug: 74184636
Test: manual
Change-Id: Ib16204c75c2cdf675d480e9c66f484bb3c51108e
1 file changed