RFR: 8364587: Update jpackage internal javadoc

[Alexey Semenyuk]

On Sun, 3 Aug 2025 23:08:17 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

> Fix javadoc errors in DefaultLauncherIcon, Launcher, and Application classes. Additionally, add javadoc to some methods of PackagingPipeline class.

@sashamatveev PTAL

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

PR Comment: https://git.openjdk.org/jdk/pull/26609#issuecomment-3150820296