RFR: 8310354: G1: Annotate G1MMUTracker::when_sec with const

[Albert Mingkun Yang]

On Tue, 20 Jun 2023 09:52:43 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

> Simply adding `const` to G1MMUTracker APIs.

Thanks for the review.

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PR Comment: https://git.openjdk.org/jdk/pull/14554#issuecomment-1607343300