RFR: 8373058: Media crash when playing MP3 over JRT protocol on macOS 26

[Kevin Rushforth]

On Mon, 15 Dec 2025 23:50:34 GMT, Alexander Matveev <almatvee at openjdk.org> wrote:

> Fixed two crashes:
> - `shouldWaitForLoadingOfRequestedResource()` was not synchronized with `dispose()`.
> - `AddBand()`, `RemoveBand()` and `MoveBand()` was not synchronized with `ProcessBufferLists()`.

Reviewers: @kevinrushforth and either @andy-goryachev-oracle or @arapte

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PR Comment: https://git.openjdk.org/jfx/pull/2008#issuecomment-3672258579