Java: Don't suggest to extract the trivial method that returns its parameter (IDEA-191899)

java/java-tests/testData/refactoring/extractMethod/SuggestChangeSignatureTrivialMethod.java

@@ -0,0 +1,11 @@
+class Node {
+    String getType() { return ""; }
+
+    String foo(Node left, Node right) {
+        String leftType = left.getType();
+        <selection>String rightType = (right.getType());</selection>
+
+        String type = "A";
+        return leftType + rightType + type;
+    }
+}

java/java-tests/testData/refactoring/extractMethod/SuggestChangeSignatureTrivialMethod_after.java

@@ -0,0 +1,15 @@
+class Node {
+    String getType() { return ""; }
+
+    String foo(Node left, Node right) {
+        String leftType = newMethod(left);
+        String rightType = newMethod(right);
+
+        String type = "A";
+        return leftType + rightType + type;
+    }
+
+    private String newMethod(Node right) {
+        return right.getType();
+    }
+}