ScalingFilterInterpreter: Option to force touch count to match finger

This is used for the situation where a modern pad may support hover,
and thus have a finger count != touch count, which would trigger old
(T5R2) behavior. By forcing touch count to match, we avoid that issue.

BUG=chrome-os-partner:36892
TEST=Manually tested on Samus

Change-Id: I55d03dc67bc928f93ee5086df664933a81d17f72
Reviewed-on: https://chromium-review.googlesource.com/251761
Reviewed-by: Charlie Mooney <charliemooney@chromium.org>
Reviewed-by: Andrew de los Reyes <adlr@chromium.org>
Tested-by: Andrew de los Reyes <adlr@chromium.org>
Commit-Queue: Andrew de los Reyes <adlr@chromium.org>
2 files changed