Fixed KT-5339 J2K: convert Objects.equals to == and !=

Mock JDK regenerated to add java.util.Objects

 #KT-5339 Fixed

j2k/tests/testData/ast/equals/ObjectsEquals.java

@@ -0,0 +1,15 @@
+//file
+import java.util.Objects;
+
+interface I {
+}
+
+class C{
+    boolean foo1(I i1, I i2) {
+        return Objects.equals(i1, i2))
+    }
+
+    boolean foo2(I i1, I i2) {
+        return !java.util.Objects.equals(i1, i2)
+    }
+}