introduce variable from one line lambda transforms body to code block (IDEA-91122)

java/java-tests/testData/refactoring/introduceVariable/OneLineLambdaValueCompatible.after.java

@@ -0,0 +1,8 @@
+class Foo {  
+    void test() {
+        Comparable<String> java = o -> {
+            int c = o.length();
+            return c;
+        };
+    }
+}