libgestures: CY Add stationary_wiggle_filter_interpreter coverage

BUG=b:258275957
TEST=USE="coverage" FEATURES="test noclean" emerge-brya chromeos-base/gestures

Change-Id: I3d40ba62894da26ae83abd3e3574edf087ea1e4c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/4035530
Auto-Submit: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Tested-by: Denis Brockus <dbrockus@chromium.org>
3 files changed