Upgrade some Log calls to Err

These all indicate states that we shouldn't get into, so they should be
logged with the higher severity level.

BUG=b:314743031
TEST=run unit tests
LOW_COVERAGE_REASON=only modifies logging for unexpected cases

Change-Id: If503b726511082d16c52858cf62291cc00926b16
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/5358098
Commit-Queue: Harry Cutts <hcutts@chromium.org>
Code-Coverage: Zoss <zoss-cl-coverage@prod.google.com>
Tested-by: Harry Cutts <hcutts@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Code-Coverage: Sean O'Brien <seobrien@chromium.org>
3 files changed