ui: Fix default item for dev external boot screen

(Manually cherry picked from CL:3298933)

Fix the default selected menu item for 2 screens in developer mode:

- VB2_SCREEN_DEVELOPER_BOOT_EXTERNAL
- VB2_SCREEN_DEVELOPER_INVALID_DISK

Previously in CL:3195521 we forgot to explicitly set it in the init()
and reinit() screen functions.

BUG=b:207448560, b:207448571
TEST=CC=x86_64-pc-linux-gnu-clang make run2tests
BRANCH=firmware-volteer-13672.B

Change-Id: I1854502251238394a7e76ad9e676bae436ad0df5
Signed-off-by: Yu-Ping Wu <yupingso@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3298658
Reviewed-by: Isaac Lee <isaaclee@google.com>
Reviewed-by: Zhuohao Lee <zhuohao@chromium.org>
1 file changed