[autotest] Handle AutoservRunError when power_supply_info is not found.

For devices that do not have power_supply_info installed, the exception
should be handled to avoid false failure on verify.

BUG=chrome-os-partner:34022
TEST=local verification.

Change-Id: I449d7c9b55307e9510ccb40d341c6b14f9cade0f
Reviewed-on: https://chromium-review.googlesource.com/237961
Trybot-Ready: Dan Shi <dshi@chromium.org>
Tested-by: Dan Shi <dshi@chromium.org>
Reviewed-by: Daniel Erat <derat@chromium.org>
Commit-Queue: Dan Shi <dshi@chromium.org>
1 file changed