Support HiresScroll gesture remapping

This commit allows HiresScroll (when target is true) to map the up and
down events to gestures that support it (i.e.AxisGesture/
IntervalGesture). This check is done by checking if wheelCompatibility()
is true.

This also allows hires scroll events to send low-res scroll events as
well.

TODO: Fix bug w/ Chromium (and some other programs?) where mapping
scroll wheel to REL_WHEEL_HI_RES will cause the program to skip events
occassionally. I have literally been stuck on this bug for a week and I
still don't know what causes it. evtest shows proper scroll events,
Firefox works fine, and libinput test-gui reports proper scrolling.

src/logid/InputDevice.h

@@ -49,6 +49,8 @@ namespace logid
 
         static uint toKeyCode(const std::string& name);
         static uint toAxisCode(const std::string& name);
+        static int getLowResAxis(uint axis_code);
+
     private:
         void _sendEvent(uint type, uint code, int value);