InputRowRadioButtons types: Relax TItemKey to accept number

And also for SelectableOptionsScreen, which this uses.

These now match SelectableOptionRow, which has already been
accepting `number`.

src/common/InputRowRadioButtons.js

@@ -68,7 +68,9 @@ type Props<TItemKey> = $ReadOnly<{|
 // represented by IconRight. NestedNavRow would probably be the wrong
 // abstraction, though, because it isn't an imput component; it doesn't have
 // a value to display.
-export default function InputRowRadioButtons<TItemKey: string>(props: Props<TItemKey>): Node {
+export default function InputRowRadioButtons<TItemKey: string | number>(
+  props: Props<TItemKey>,
+): Node {
   const { navigation, label, description, valueKey, items, onValueChange } = props;
 
   const screenKey: string = useRef(`selectable-options-${randString()}`).current;

src/common/SelectableOptionsScreen.js

@@ -78,7 +78,9 @@ LogBox.ignoreLogs([/selectable-options > params\.onRequestSelectionChange \(Func
 // If we need separate components dedicated to checkboxes and radio buttons,
 // we can split this. Currently it's up to the caller to enforce the
 // radio-button invariant (exactly one item selected) if they want to.
-export default function SelectableOptionsScreen<TItemKey: string>(props: Props<TItemKey>): Node {
+export default function SelectableOptionsScreen<TItemKey: string | number>(
+  props: Props<TItemKey>,
+): Node {
   const { route } = props;
   const { title, description, items, onRequestSelectionChange } = route.params;