Implement TextInput.onSubmitEditing for Fabric

[chrisglein]

Part of #11145

Example

      <TextInput
        accessibilityLabel="Prompt input"
        multiline={true}
        placeholder="Ask me anything"
        style={{flexGrow: 1, flexShrink: 1}}
        onChangeText={newValue => setValue(newValue)}
        submitKeyEvents={[{code: 'Enter', shiftKey: false}]}
        onSubmitEditing={submitValue}
        value={defaultText ?? value}/>