8346610: Make all imports conformant in the FFM API

[minborg]

This PR proposes to clean up all the imports in the FFM lib (excluding tests).

Passes tier1-tier3

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• JDK-8346610: Make all imports conformant in the FFM API (Enhancement - P5)

Reviewing

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Update a local copy of the PR:
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$ git pull https://git.openjdk.org/jdk.git pull/22827/head

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Link to Webrev Comment

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[openjdk]

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[openjdk]

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[mlbridge]

Webrevs

• 00: Full (490701e9)

[AlanBateman]

Just curious where this style/convention is coming from, I've always put internal packages after the import of standard APIs.

[minborg]

Both alternatives were present and I picked the most prevailing one in the package. Also, this is what you get when you auto format in IntelliJ. But if there is a preference for the other way, we could switch. No problem.

[AlanBateman]

I don't have any strong opinion on the topic, I was mostly just curious when I saw "conformant" in the title.