rdp: Update cursor position on most mouse messages

The RDP spec says we can trust x, y position on all messages except
PTR_FLAGS_WHEEL and PTR_FLAGS_HWHEEL, so let's do that to ensure
proper sync with the RDP client.

Co-authored-by: Steve Pronovost <spronovo@microsoft.com>
Co-authored-by: Brenton DeGeer <brdegeer@microsoft.com>
Signed-off-by: Hideyuki Nagase <hideyukn@microsoft.com>
Signed-off-by: Steve Pronovost <spronovo@microsoft.com>
Signed-off-by: Brenton DeGeer <brdegeer@microsoft.com>