Add --wipe-and-use-fbe option to fastboot for FBE userdata marker.

With this option, userdata is wiped and recreated with the
"convert_fbe" file in the root, which triggers conversion to FBE.

Bug: 25898323
Change-Id: I9347b7057b6278e7e6437504896b22c82dd01d89
3 files changed