ui: Add VB2_UI_ERROR_MINIOS_BOOT_FAILED Add a new error type VB2_UI_ERROR_MINIOS_BOOT_FAILED for MiniOS boot failure. BUG=b:200750322 TEST=emerge-cherry depthcharge BRANCH=none Change-Id: Ia567c9ec735e7aae830ad311b2261e01fed53876 Signed-off-by: Yu-Ping Wu <[email protected]> Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3249590 Reviewed-by: Hsuan Ting Chen <[email protected]> Reviewed-by: Jae Hoon Kim <[email protected]>