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This contains the fix for Msan failures.
This CL adds some basic fingerprint UI to views lock screen to support
fingerprint fishfood.
The detailed specs are not ready and may be subject to change. So it
may need to be polished in the future for adding animation, adjusting
styles etc.

Current mocks:
https://gallery.googleplex.com/projects/MCHbtQVoQ2HCZdwfnbqy2eSi/files/MCHm5Lyh8lQ6SZ3vjzwd3Uo8wMSJbxAVNpw

TBR=tsepez@chromium.org

Bug: 835357
Change-Id: I5daed01a18b2235e8331c3d48bbfe5b63c491672
Reviewed-on: https://chromium-review.googlesource.com/1047958Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Xiaoyin Hu <xiaoyinh@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#557254}
Reviewed-on: https://chromium-review.googlesource.com/1054091
Cr-Commit-Position: refs/heads/master@{#558349}