ICU-12722 Added default case in a switch statement to resolve an ErrorProne and other static code analysis tool's warning.

X-SVN-Rev: 39804

icu4j/main/classes/core/src/com/ibm/icu/impl/TZDBTimeZoneNames.java

@@ -203,6 +203,10 @@ public class TZDBTimeZoneNames extends TimeZoneNames {
             case SHORT_DAYLIGHT:
                 name = _names[1];
                 break;
+            default:
+                // No names for all other types handled by
+                // this class.
+                break;
             }
 
             return name;