Send raw coordinates to client but scale when getting relative

The current code scales the coordinates before sending to the client.
This changes the coordinates so when the client requests raw
coordinates, they are actually getting the scaled ones. Instead, don't
scale the coordinates in InputDispatcher and instead send the scale
factors to the client. When the client requests raw coordinates, they
will get the unscaled ones. When they request relative coordinates, they
will get the coordinates with the scale and offset applied.

Fixes: 140786233
Test: atest libinput_tests
Change-Id: I99b9ce7236511f595a8780506bf5aea8c75ed577