RefactoringUtil#ensureCodeBlock enhanced and used in Surround with try-catch

Fixes IDEA-178781 "Surround with try-catch" QuickFix for "Unhandled exception" in a field initializer
Enables stream-to-loop in field initializer
Fixes stream-to-loop in for initializer
Disables stream-to-loop in for update

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/surroundWithTry/afterField.java

@@ -0,0 +1,19 @@
+// "Surround with try/catch" "true"
+import java.io.IOException;
+
+class C {
+    static final String S;
+
+    static {
+        try {
+            S = getString();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    static String getString() throws IOException {
+        if(Math.random() > 0.5) throw new IOException();
+        return "foo";
+    }
+}