[Navigation Breadcrumbs] - Not Available in library classes

When I open libarary casses such as internal JDK classes, let's say Character.class or String.class, there are no breadcrumbs present. Is this desired behaviour?

Environment

• Operating System:
• JDK version:
• Visual Studio Code version:
• Java extension version:

Steps To Reproduce

1. Naviagate to String.class
2. Check for navigation breadcrumbs

[Please attach a sample project reproducing the error]
Please attach logs

Current Result

Expected Result

Additional Informations

issue 中没有提到源文件或测试。首先在 VS Code 中打开 String.class 或 Character.class，并将 breadcrumb 的行为与项目类进行比较，以重现该问题；预期行为和回归检查仍需确定。