correctly find usages of overridden Java method through synthetic accessors

#KT-12869 Fixed

idea/testData/findUsages/java/findJavaMethodUsages/OverriddenMethodSyntheticAccessor.0.java

@@ -0,0 +1,10 @@
+// PSI_ELEMENT: com.intellij.psi.PsiMethod
+// OPTIONS: usages
+public interface AI {
+    String <caret>getFoo();
+
+    public class A implements AI {
+        @Override
+        public String getFoo() {return "";}
+    }
+}