rb: more touch options (#699)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Add two options:

1. option to adjust poll rate
2. option to change emulation size

Also, the default configuration is changing from:

* ~1000Hz ish to 120Hz (default)
* 3x3 point to 1x1 point

In theory this does not make a meaningful change to how the game plays.
But if people want the old behavior they can change it.

## Testing
Tested on Volzza2 and Reflesia.

src/spice2x/games/rb/rb.h

@@ -7,6 +7,8 @@
 namespace games::rb {
 
     extern uint16_t TOUCH_SCALING;
+    extern uint8_t TOUCH_SIZE;
+    extern uint16_t TOUCH_POLL_RATE;
 
     class RBGame : public games::Game {
     public: