[lworld] RFR: 8368800: [lworld] Early larval frame and strict should be guarded by preview

[Chen Liang]

On Thu, 25 Sep 2025 23:35:25 GMT, Chen Liang <liach at openjdk.org> wrote:

> Early larval frame should be generated by the value classes preview settings. To prevent strict presence without early larvals, add a preview check to block strict without value objects preview enabled.

Thanks for the review!

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PR Comment: https://git.openjdk.org/valhalla/pull/1637#issuecomment-3340634120