Forward action button to device

On click event, only the whole buttons state was passed to the device.
In addition, on ACTION_DOWN and ACTION_UP, pass the button associated to
the action.

Refs #3635 <https://github.com/Genymobile/scrcpy/issues/3635>

Co-authored-by: Romain Vimont <rom@rom1v.com>
Signed-off-by: Romain Vimont <rom@rom1v.com>

app/src/control_msg.h

@@ -65,6 +65,7 @@ struct sc_control_msg {
         } inject_text;
         struct {
             enum android_motionevent_action action;
+            enum android_motionevent_buttons action_button;
             enum android_motionevent_buttons buttons;
             uint64_t pointer_id;
             struct sc_position position;