Withdrawn: 8325858: Replace Unsafe usage in XEmbeddingContainer with FFM API

[duke]

On Wed, 14 Feb 2024 13:27:45 GMT, Per Minborg <pminborg at openjdk.org> wrote:

> This PR proposes to remove the use of `Unsafe` in the class `XEmbeddingContainer ` and replace it with the supported FFM API.
> 
> I tried to make this PR as small as possible while opening up for migration of other classes later on (such as `XEmbedServer` which can be modified similarly under a separate PR).
> 
> There are also three drive-by fixes in this PR:
>  * Moved JavaDocs for `XAtom` to its proper location and fixed two typos in the text
>  * Declared a field in `XEmbeddingContainer` as `private final`
>  * In `XAtom`, use a utility method `assertAtomInitialized()` instead of the current duplicated code
> 
> Tested and passed tier1-5

This pull request has been closed without being integrated.

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PR: https://git.openjdk.org/jdk/pull/17846