RFR: 8309558: Create implementation of NSAccessibilityCheckBox protocol [v2]

[Ambarish Rapte]

On Mon, 24 Jul 2023 18:34:22 GMT, Alexander Zuev <kizune at openjdk.org> wrote:

>> also
>> 8309629: Create implementation of NSAccessibilityRadioButton protocol
>> 
>> Create implementation of NSAccessibilityCheckBox and NSAccessibilityRadioButton protocols
>> Add workaround for the wrong focus owner announcement with radio buttons
>> Add workaround for wrong magnifier text on buttons
>
> Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add newline at the end of the header files.

Providing a minor comment for a warning.
Also noticed that, with this change tab are read as radio button. [ Tested with ensemble ]

<img width="646" alt="Screenshot 2023-08-06 at 3 23 35 PM" src="https://github.com/openjdk/jfx/assets/11330676/1d9ade44-2305-4f13-afe3-2d586934a918">

modules/javafx.graphics/src/main/native-glass/mac/a11y/AccessibleBase.m line 174:

> 172:     jobject jresult = NULL;
> 173:     GET_MAIN_JENV;
> 174:     if (env == NULL) return NULL;

This generates a warning:
`warning: incompatible pointer to integer conversion returning 'void *' from a function with result type 'BOOL' (aka 'signed char') [-Wint-conversion]`

-------------

Changes requested by arapte (Reviewer).

PR Review: https://git.openjdk.org/jfx/pull/1184#pullrequestreview-1564090685
PR Review Comment: https://git.openjdk.org/jfx/pull/1184#discussion_r1285169799