fix org.mapleir.app.service.ClassTree#getAllBranches

[InkerBot]

For example, we have three classes

public class Abst {
    public int apply(int a) {
        return a + 3;
    }
}

public interface Inte {
    int apply(int a);
}

public class Top extends Abst implements Inte {

    public void run() {
        if (((Inte) this).apply(3) == 6) {
            System.out.println("SUCCESS");
        } else {
            System.out.println("FAILURE");
        }
    }
}

If call this with Inte, it should return all these classes and java.lang.Object, but now it won't return Abst