Java to Kotlin converter: refactoring and fixing switch conversion

#KT-5390 Fixed

j2k/tests/testData/ast/switch/continueAndBreakWithLabel.kt

@@ -0,0 +1,13 @@
+fun foo() {
+    @Loop while (true) {
+        when (take()) {
+            1 -> continue
+            2 -> {
+                System.out.println("2")
+                return
+            }
+            3 -> break@Loop
+        }
+        System.out.println()
+    }
+}