send android selection coordinates when touches end

packages/web/lib/highlights/useSelection.tsx

@@ -16,6 +16,16 @@ export function useSelection(
 
   const handleFinishTouch = useCallback(
     async (mouseEvent) => {
+      const tapAttributes = {
+        tapX: mouseEvent.clientX,
+        tapY: mouseEvent.clientY,
+      }
+
+      window?.AndroidWebKitMessenger?.handleIdentifiableMessage(
+        'userTap',
+        JSON.stringify(tapAttributes)
+      )
+
       const result = await makeSelectionRange()
 
       if (!result) {