Screen Reader reads password in Password TextField

Summary:
When a password TextField is focused, the Screen Reader reads the plain text password instead of the masked characters. (Another bug is that Accessible.name for such a field is never read.)

Repro:
1. Create a password TextField in QML as follows and add another control, like a RadioButton.

TextField {
    id: passwordField

    Accessible.name: "Enter Password"
    Accessible.passwordEdit: true
    Accessible.role: Accessible.EditableText

    echoMode: TextInput.Password
    height: 50
    width: 200
}

RadioButton {
    checked: true
    text: qsTr("First")
}

2. Start a Screen Reader on Windows (Narrator) or Android (Talkback).

3. Enter text into the password field. On Windows, the screen reader will say 'Hidden' as expected, and the text in the field is masked as expected.

4. Tab out of the password field to other controls and tab back to the password field. Note that the screen reader reads the plain text password in the field on focus.

Expected:
The screen reader should not read the plain text password when the password field is focused. Instead, it should either read nothing or it should read the mask characters, as is the case in other frameworks.

Bug Details:
The cause of the bug on Windows is that the Value pattern for this text field is returning the plain text as the value, so the screen reader will read it. See the following source code that shows this. The fix is for this code to return masked characters if echoMode= TextInput.Password. Otherwise, a screen reader or any other accessibility client will be able to read the plain text password.

qtdeclarative\src\quick\accessible\qaccessiblequickitem.cpp
QString QAccessibleQuickItem::text(QAccessible::Text textType) const
{
     :

    // the following block handles item-specific behavior
    if (role() == QAccessible::EditableText) {
        if (textType == QAccessible::Value) {
            :
            QVariant text = object()->property("text");
            return text.toString();