CRAS: test_client - Fix wrong time convertion

Should use sec_offset instead of sec.

BUG=None
TEST=cras_test_client --dump_a

Change-Id: I37a8395ff3d8bbb04f0c45f1fe14ae616a8b941e
Reviewed-on: https://chromium-review.googlesource.com/1679964
Tested-by: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Commit-Ready: Yu-Hsuan Hsu <yuhsuan@chromium.org>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
1 file changed