fix: move setting default values of medium-detent related props to InnerScreen (#1811)

## Description

Default values for medium-detent related props were set only in
`NativeStackView` so only in case user used native stack directly from
`react-native-screens`. This led to buggy behaviour when
`@react-navigation/native-stack` was in use.

See conversation:
#1686 (comment)

## Changes

Default prop values are now set in `InnerScreen` in `index.native.tsx`
which is used internally by `@react-navigation/native-stack` package.

# Test case

See conversation:
#1686 (comment)
(and below).

Use `stackPresentation: 'formSheet'` with native stack from
`@react-navigation/native-stack` and see that the modal is opened by
default to full height.

## Checklist

- [x] Ensured that CI passes

Author: kkafar

src/index.native.tsx

@@ -261,6 +261,16 @@ class InnerScreen extends React.Component<ScreenProps> {
       ...rest
     } = this.props;
 
+    // To maintain default behaviour of formSheet stack presentation style & and to have resonable
+    // defaults for new medium-detent iOS API we need to set defaults here
+    const {
+      sheetAllowedDetents = 'large',
+      sheetLargestUndimmedDetent = 'all',
+      sheetGrabberVisible = false,
+      sheetCornerRadius = -1.0,
+      sheetExpandsWhenScrolledToEdge = true,
+    } = rest;
+
     if (enabled && isPlatformSupported) {
       AnimatedNativeScreen =
         AnimatedNativeScreen ||
@@ -300,6 +310,11 @@ class InnerScreen extends React.Component<ScreenProps> {
           <AnimatedNativeScreen
             {...props}
             activityState={activityState}
+            sheetAllowedDetents={sheetAllowedDetents}
+            sheetLargestUndimmedDetent={sheetLargestUndimmedDetent}
+            sheetGrabberVisible={sheetGrabberVisible}
+            sheetCornerRadius={sheetCornerRadius}
+            sheetExpandsWhenScrolledToEdge={sheetExpandsWhenScrolledToEdge}
             gestureResponseDistance={{
               start: gestureResponseDistance?.start ?? -1,
               end: gestureResponseDistance?.end ?? -1,