cros-test: fix autotest arg backward compat

Fix bug where autotest args are being treated as a map when they are
in fact a list.

BUG=None
TEST=ran tast-generic-list with new cros-test container using old arg passing field

Change-Id: Id756175deb82e163402a759c2bba8c3ece4fce4b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5402255
Auto-Submit: Jack Gelinas <jackgelinas@google.com>
Commit-Queue: Derek Beckett <dbeckett@chromium.org>
Tested-by: Jack Gelinas <jackgelinas@google.com>
Reviewed-by: Derek Beckett <dbeckett@chromium.org>
(cherry picked from commit e1b5d9e1a4cfc659005d9f70136e48e1f9fb9614)
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/5403486
Commit-Queue: Jack Gelinas <jackgelinas@google.com>
1 file changed