introduce field: fix introducing in anonymous class; fix enclosing constructor (IDEA-66774)

java/java-tests/testData/refactoring/introduceField/beforeEnclosingAnonymous.java

@@ -0,0 +1,11 @@
+class TestRefactoring {
+    public TestRefactoring() {
+        Runnable r = new Runnable() {
+            @Override
+            public void run() {
+                Integer to<caret>Field = new Integer("0");
+                System.out.println(toField);
+            }
+        };
+    }
+}