Imports are not included in the document symbols returned from "getDocumentSymbols" API

Hi

I am writing a vscode extension and I want to get the symbols of a JAVA file.

Environment
Operating System: windows 10
Visual Studio Code version: 1.50.0

Steps To Reproduce
If I run this sample code :

`const vscodeCDSExtension = extensions.getExtension("redhat.java");
const javaDocParams : DocumentSymbolParams = {
textDocument: {
uri: Uri.file(filePath).toString()
}
};

if (vscodeCDSExtension && vscodeCDSExtension.isActive) {
const symbols = await vscodeCDSExtension.exports.getDocumentSymbols(javaDocParams);
console.log(symbols.length);
}`

Current Result
The "imports" of the file are not included in the returned symbols (only "package", classes and methods are returned)

Expected Result
The "imports" also should be included in the result

The JAVA file is attached

CatalogServiceHandler.zip

Comienza reproduciendo la llamada a la API getDocumentSymbols del issue con el archivo Java adjunto CatalogServiceHandler.zip. Rastrea cómo se devuelven los paquetes, las clases y los métodos; después, verifica que las declaraciones de importación estén incluidas en el resultado de símbolos y añade o actualiza la cobertura si el repositorio proporciona una prueba correspondiente.