init: Add setup_fs service for userdata

* Used for formatting data after unlock,
  as the userdata partition is zeroed out after unlock,
  but a filesystem isn't created.

Change-Id: I17aba9ed9778431e48f9605d10a7fde8be9b7b86
Merge branch 'cm-11.0' of git://github.com/CyanogenMod/android_device_sony_rhine-common into new