vboot/ui: Add tests for to_dev transition flow

Unit tests paired with CL:2168072.

BUG=b:146399181, b:156448738
TEST=make clean && make runtests
TEST=make clean && DETACHABLE=1; make runtests
TEST=make clean && PHYSICAL_PRESENCE_KEYBOARD=1; make runtests
BRANCH=none

Cq-Depend: chromium:2214457
Signed-off-by: Hsuan Ting Chen <roccochen@chromium.org>
Change-Id: Ic6b109c514e1582d7eb29040135aeaa884b243be
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/2198274
Reviewed-by: Yu-Ping Wu <yupingso@chromium.org>
Commit-Queue: Yu-Ping Wu <yupingso@chromium.org>
3 files changed