RFR: 8301604: Replace Collections.unmodifiableList with List.of [v3]

[Nir Lisker]

On Wed, 1 Feb 2023 23:50:07 GMT, Glavo <duke at openjdk.org> wrote:

>> `List.of` is cleaner, and can slightly reduce the memory footprint for lists of one or two elements.
>> 
>> Because `List.of` can only store non-null elements, I have only replaced a few usage.
>> 
>> Can someone open an Issue on JBS for me?
>
> Glavo has updated the pull request incrementally with one additional commit since the last revision:
> 
>   reformat

Marked as reviewed by nlisker (Reviewer).

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PR: https://git.openjdk.org/jfx/pull/1012