RFR: 8356486: ReverseOrderListView should override reversed() to return `base`

[Per Minborg]

On Fri, 9 May 2025 06:24:50 GMT, Per Minborg <pminborg at openjdk.org> wrote:

>> This should already be covered by the testDoubleReverse() test in test/jdk/java/util/SequencedCollection/Basic.java.
>
> There are some new collections (such as StableList) that are not covered in Basic. But maybe they should have their separate tests?

`UnmodifiableSequencedCollection` double-reversed is not an identity function. But at least, it does not nest, as it returns a new USC with the underlying collection reversed.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25120#discussion_r2081060529