Move persist entry to fstab and mount at /mnt/vendor/persist
Apply required user, group and permissions once persist
folder is created through __mount and parititon is mounted.
Run restorecon on /mnt/vendor/persist.
Change-Id: I20a16f3669bc7abf9844525c6ba0db1521a5a8e2
* Mounting /system and /vendor partitions is handled in kernel now,
however removing the entries from fstab caused issues building
the OTA. The workaround was to have a separate fstab, but turns out
that simply setting the recoveryonly flag does the trick because
those are then ignored during a normal Android boot.
Change-Id: I2944384d0a1c41bc9f9f51e2e29daff2bed0a0f4
