[foreign-memaccess+abi] RFR: 8291286: Improve JavaDocs for static constructors in MemorySession

[Per-Åke Minborg]

On Thu, 28 Jul 2022 07:30:28 GMT, Per-Åke Minborg <duke at openjdk.org> wrote:

> This PR adds information to the static constructor methods in MemorySession to improve clarity for new users.
> 
> This is my first PR for a JDK project so I am eager to receive feedback and improvement suggestions from the community.

With respect to OCA verification: I am an Oracle employee.

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

PR: https://git.openjdk.org/panama-foreign/pull/693