RFR: 8362598: [macos] Add tests for custom info plist files

[Alexander Matveev]

On Fri, 26 Sep 2025 11:22:48 GMT, Alexey Semenyuk <asemenyuk at openjdk.org> wrote:

>> - Added test for custom info plist to cover app image including embedded runtime and runtime installer.
>> - Fixed bug in `writePList`. It was missing `writeStartDocument()/writeEndDocument()` and `DOCTYPE` should be full xml string.
>
> src/jdk.jpackage/macosx/classes/jdk/jpackage/internal/util/PListWriter.java line 93:
> 
>> 91:     public static void writePList(XMLStreamWriter xml, XmlConsumer content)
>> 92:             throws XMLStreamException, IOException {
>> 93:         xml.writeStartDocument();
> 
> Why do we need `writeStartDocument()/writeEndDocument()` calls?

To write XML declaration to Info.plist file. Without it reading PList file fails.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27509#discussion_r2389512578