vboot: add vb2api_phone_recovery_ui_enabled()

Add a new flag VB2_SECDATA_KERNEL_FLAG_PHONE_RECOVERY_UI_DISABLED to
vb2_secdata_kernel_flags to separate phone recovery functionality from
UI instructions. Also add vb2api_phone_recovery_ui_enabled() to control
the UI behavior.

BRANCH=none
BUG=b:156532222
TEST=make runtests

Cq-Depend: chromium:2260155
Change-Id: Ib91a206e680ba2cb47762d8a5c0c0ce146918b7d
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2259632
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Joel Kitching <kitching@chromium.org>
7 files changed