Refine dirty files computation in case of Java source changes

#KT-17621 In Progress

jps-plugin/testData/incremental/withJava/javaUsedInKotlin/changeSignature/JavaClass.java

@@ -1,4 +1,7 @@
 public class JavaClass {
-    public static void foo() {
+    public void foo() {
+    }
+
+    public void bar() {
     }
 }