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 <[email protected]> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2259632 Reviewed-by: Julius Werner <[email protected]> Reviewed-by: Joel Kitching <[email protected]>