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 "";}
+    }
+}

idea/testData/findUsages/java/findJavaMethodUsages/OverriddenMethodSyntheticAccessor.1.kt

@@ -0,0 +1,4 @@
+fun AI.A.bar() {
+    getFoo() // Found
+    foo // Not found
+}

idea/testData/findUsages/java/findJavaMethodUsages/OverriddenMethodSyntheticAccessor.results.txt

@@ -0,0 +1,2 @@
+Function call 2 getFoo() // Found
+Value read 3 foo // Not found