RFR: 8289384: Fix warnings: method does not override the inherited method since it is private to a different package

[Kevin Rushforth]

On Fri, 8 Jul 2022 21:37:47 GMT, Andy Goryachev <duke at openjdk.org> wrote:

> The fix includes:
> - renaming of offending methods to avoid confusion
> - explicitly declaring the offending methods as private

Looks good to me.

@nlisker any concerns?

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

Marked as reviewed by kcr (Lead).

PR: https://git.openjdk.org/jfx/pull/824