core: fix class imports

jadx-samples/src/main/java/jadx/samples/TestImports.java

@@ -0,0 +1,25 @@
+package jadx.samples;
+
+import jadx.samples.otherpkg.A;
+
+/**
+ * Tests:
+ * - class B not imported
+ */
+public class TestImports extends AbstractTest {
+
+	public class C extends A {
+		public B getB() {
+			return null;
+		}
+	}
+
+	@Override
+	public boolean testRun() {
+		return true;
+	}
+
+	public static void main(String[] args) {
+		new TestImports().testRun();
+	}
+}

jadx-samples/src/main/java/jadx/samples/otherpkg/A.java

@@ -0,0 +1,7 @@
+package jadx.samples.otherpkg;
+
+public class A {
+	protected class B {
+
+	}
+}