factory_VPD: Allow assigning individual task to run.

When overriding VPD values, or when designing factory flow, it is possible that
partner want to hard-code fixed VPD values (ex, region), and still able to input
volatile values (ex, serial number).

To support that, add a new "task_list" param to specify which task to perform.

BUG=none
TEST=Manually verified factory_VPD in factory UI.

Change-Id: I6e40f977c0e456654a93871a4f6181c3c5296e7f
Reviewed-on: https://gerrit.chromium.org/gerrit/23613
Reviewed-by: Jon Salz <jsalz@chromium.org>
Tested-by: Hung-Te Lin <hungte@chromium.org>
1 file changed