RFR: 8343622: AesDkCrypto.stringToKey should not return null [v5]

[Weijun Wang]

On Thu, 5 Dec 2024 03:16:09 GMT, Valerie Peng <valeriep at openjdk.org> wrote:

>> Oops, fixed.
>
> Missed copyright year update of this file? The other 2 are updated.

Actually, some other commits have already updated it. I merge from master and now it shows 2024.

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PR Review Comment: https://git.openjdk.org/jdk/pull/21908#discussion_r1870589510