RFR: 8309733: [macOS, Accessibility] VoiceOver: Incorrect announcements of JRadioButton

[Abhishek Kumar]

On Wed, 21 Jun 2023 20:37:01 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

> Only pass value changed event to the native accessibility peer when the value is actually changed. While at fixing it for RadioButton also fixing it for checkbox and toggle button so there is no need to re-visit this file later.
> Also updating the copyright year.

Verified the fix and it behaves as expected.

`Expected announcement: "Radio Two, radio button, 2 of 3. ..." `
As mentioned in JBS, should VO announce radiobutton's position also?

There is an another bug [JDK-8309732](https://bugs.openjdk.org/browse/JDK-8309732) for position issue.

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PR Comment: https://git.openjdk.org/jdk/pull/14605#issuecomment-1602031731