IDEA-127499 Decompiler doesn't support switch over enums

testData/results/TestSwitchOnStrings.dec

@@ -0,0 +1,13 @@
+package pkg;
+
+public class TestSwitchOnStrings {
+  public int testSOE(String s) {
+    switch (s) {
+      case "xxx":
+        return 2;
+      case "yyy":
+        return 1;
+    }
+    return 0;
+  }
+}