hal_adapter: Fix lint errors reported by `cros lint`

BUG=b:30824236
TEST=Pass presubmit checks.

Change-Id: I303087e95bf25655bcb5db5e9adc9c594df72226
Reviewed-on: https://chromium-review.googlesource.com/410465
Commit-Ready: Ricky Liang <jcliang@chromium.org>
Tested-by: Ricky Liang <jcliang@chromium.org>
Reviewed-by: Wu-cheng Li <wuchengli@chromium.org>
20 files changed