The package is accessible from more than one module

In the sample project:
[exp.zip](https://github.com/user-attachments/files/17825477/exp.zip)

├── `com.company.a`: This bundle uses `Bundle-Classpath` to embed a JAR that contains packages like `javax.lang.model.element`.
└── `com.company.b`: This bundle uses `Import-Package` to explicitly import the `com.company.util` package from bundle a.

In bundle `b`, there is code that imports `javax.lang.model.element.Element`. However, ECJ reports the following error:

> "The package javax.lang.model.element is accessible from more than one module: , java.compiler."

This occurs because the package `javax.lang.model.element` is present in both the embedded JAR of bundle `a` and the JRE.

From the perspective of the OSGi classloader, bundle `b` should only have access to the packages of bundle `a` that it explicitly declares in its `Import-Package` directive. However, it seems that ECJ does not strictly adhere to OSGi classloader semantics. Instead, it includes all the packages of bundle `a` in the classpath of bundle `b` during compilation, leading to the conflict.