[foreign-memaccess+abi] RFR: Change classes into records and fix finality [v2]

[Per Minborg]

On Mon, 19 Sep 2022 13:17:11 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Revert changes to VMStorage
>
> src/java.base/share/classes/jdk/internal/foreign/abi/ABIDescriptor.java line 53:
> 
>> 51:                          int shadowSpace,
>> 52:                          VMStorage targetAddrStorage,
>> 53:                          VMStorage retBufAddrStorage) {
> 
> Please move the line splitting changes to a separate PR. I think more discussion is needed on that. But we can move forward with some of the changes in this PR I think.

I will hold back the other splittings. Can we accept the ones here to move forward?

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PR: https://git.openjdk.org/panama-foreign/pull/725