invert if: check precedence and keep parenthesis accordingly (IDEA-175062)

replace duplicated negation utility

java/java-tests/testData/codeInsight/invertIfCondition/afterRedundantParenthesis.java

@@ -0,0 +1,13 @@
+// "Invert 'if' condition" "true"
+class A {
+    
+    void method(Object x) {
+        if (x instanceof String) {
+            System.out.println(((String) x).toUpperCase());
+        }
+        else {
+            System.out.println(x.toString());
+        }
+    }
+
+}