RFR: 8295044: Implementation of Foreign Function and Memory API (Second Preview) [v4]

[Maurizio Cimadamore]

> This PR contains the API and implementation changes for JEP-434 [1]. A more detailed description of such changes, to avoid repetitions during the review process, is included as a separate comment.
> 
> [1] - https://openjdk.org/jeps/434

Maurizio Cimadamore has updated the pull request incrementally with one additional commit since the last revision:

  Add missing tests

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Changes:
  - all: https://git.openjdk.org/jdk/pull/10872/files
  - new: https://git.openjdk.org/jdk/pull/10872/files/e8b95f83..0c70da2c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=02-03

  Stats: 162 lines in 3 files changed: 162 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/10872.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10872/head:pull/10872

PR: https://git.openjdk.org/jdk/pull/10872