RFR: 8150564: Migrate useful ExtendedRobot methods into awt.Robot

[Phil Race]

On Wed, 27 Aug 2025 18:40:07 GMT, Chen Liang <liach at openjdk.org> wrote:

> Is there a reason these fields are not static? Non-static final fields like these are constant only in the class and not constant when used by other classes, and require an instance to access, but I don't find these differences convincing as the reason.

This looks like a mistake. In an earlier version of this change there were also variables to over-ride these for this instance named "stepDelay" and "stepLength" and they were inadvertently marked as static. 
I said they should be instance variables .. and that seems to have then been applied to the DEFAULT_* variables too which was not the request.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26969#discussion_r2305132231