Fix several text field accessibility issues:

1. Report scrollable text nodes as having TEXT role, rather than SCROLL_PANE. This fixes accessibility for BTF2.
2. Add AccessibleState.EDITABLE to editable text fields.
3. Correctly return getSelectionStart and getSelectionEnd for inverted selection.
4. Correctly return getSelectedText() as null when there is no selection.
5. Fire ACCESSIBLE_TEXT_PROPERTY property change event with the position rather than the text, as AccessibleJTextComponent does.
6. Fire ACCESSIBLE_SELECTION_PROPERTY when the selection changes.

Fixes https://youtrack.jetbrains.com/issue/CMP-7461
Fixes https://youtrack.jetbrains.com/issue/CMP-9229

Testing

Tested manually and added unit tests.

fun main() = singleWindowApplication {
    TextFields()
}

@Composable
private fun TextFields() {
    Column(
        modifier = Modifier.fillMaxSize().padding(16.dp),
    ) {
        Text("TextField1 1")
        var text1 by remember { mutableStateOf("") }
        TextField(
            value = text1,
            onValueChange = { text1 = it },
        )

        Spacer(Modifier.height(64.dp))
        Text("TextField2")
        val textFieldState = rememberTextFieldState()
        TextField(state = textFieldState)

        Spacer(Modifier.height(64.dp))
        Text("JTextField 1")
        SwingPanel(
            factory = {
                JTextField()
            },
            modifier = Modifier
                .size(500.dp, 60.dp)
        )
    }
}

This should be tested by QA

Release Notes

Fixes - Desktop

• Fix the accessibility issue where screen readers cannot review text in a text field
• Fix the accessibility issue where scrollable text fields are not accessible for screen readers