RFR: 8295044: Implementation of Foreign Function and Memory API (Second Preview) [v33]

[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:

  Polish javadoc:
  * Make sure that first para of class javadoc is succinct and descriptive
  * Remove references to "access" var handle or "memory segment view" var handle (just use var handle)
  * Minor tweak to layout classes javadoc - use `@see` in value layouts instead of a dedicated para.
  * Other minor typos fixes

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/10872/files
  - new: https://git.openjdk.org/jdk/pull/10872/files/6699ad99..5a75118b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=32
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=10872&range=31-32

  Stats: 59 lines in 10 files changed: 19 ins; 18 del; 22 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