libgestures: CY Add metrics_filter_interpreter coverage

BUG=b:258276332
TEST=USE="coverage" FEATURES="test noclean" emerge-brya chromeos-base/gestures

Change-Id: If0b182f1379af08f2da2121a5dda38b234740023
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/gestures/+/4035529
Commit-Queue: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Sean O'Brien <seobrien@chromium.org>
Auto-Submit: Denis Brockus <dbrockus@chromium.org>
Tested-by: Denis Brockus <dbrockus@chromium.org>
3 files changed