fix: include interfaces in superclass relationships

quark/core/apkinfo.py

@@ -452,7 +452,7 @@ def superclass_relationships(self) -> Dict[str, Set[str]]:
 
         for _class in self.analysis.get_classes():
             hierarchy_dict[str(_class.name)].add(str(_class.extends))
-            hierarchy_dict[str(_class.name)].union(
+            hierarchy_dict[str(_class.name)].update(
                 str(implements) for implements in _class.implements
             )
 

tests/core/test_apkinfo.py

@@ -1,4 +1,5 @@
 import os
+from types import SimpleNamespace
 from typing import Literal, Tuple
 import zipfile
 
@@ -689,6 +690,24 @@ def test_superclass_relationships_with_expected_class(self, apkinfo):
 
         assert expected_upper_class == upper_set
 
+    def test_superclass_relationships_include_implemented_interfaces(self):
+        apkinfo = AndroguardImp.__new__(AndroguardImp)
+        apkinfo.analysis = SimpleNamespace(
+            get_classes=lambda: [
+                SimpleNamespace(
+                    name="Lexample/Child;",
+                    extends="Lexample/Parent;",
+                    implements=["Lexample/FirstInterface;", "Lexample/SecondInterface;"],
+                )
+            ]
+        )
+
+        assert apkinfo.superclass_relationships["Lexample/Child;"] == {
+            "Lexample/Parent;",
+            "Lexample/FirstInterface;",
+            "Lexample/SecondInterface;",
+        }
+
     @staticmethod
     @pytest.mark.parametrize(
         "test_input, expected",