DataFlowInspection: npe fixes fixed

Fixes duplicating NPE expression are disabled when expression has side-effect (not when it's a method call)
Parentheses added to generated code when necessary

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/replaceWithTernaryOperator/afterTernary.java

@@ -0,0 +1,8 @@
+// "Replace with '(b ? null : "foo") != null ?:'" "true"
+class A {
+  void bar(String s) {}
+
+  void foo(boolean b){
+    bar((b ? null : "foo") != null ? b ? null : "foo" : null);
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/replaceWithTernaryOperator/beforeTernary.java

@@ -0,0 +1,8 @@
+// "Replace with '(b ? null : "foo") != null ?:'" "true"
+class A {
+  void bar(String s) {}
+
+  void foo(boolean b){
+    bar(b ? null<caret> : "foo");
+  }
+}