FPII-2809 :[Part 1]Denial of service vulnerability in Setup Wizard CVE-2017-0498 A-30352311

[PATCH 2/3] Prevent writing to FRP partition during factory reset.
Avoid potential race condition between FRP wipe and write operations
during factory reset by making the FRP partition unwritable after
wipe.

Bug: 30352311
Test: manual

Change-Id: Id5b5f430d08664ad3e07f2c556bfdc2dbc77c2cc
2 files changed