Merge change 1668 into donut

* changes:
  Document exception from parse3339

core/java/android/text/format/Time.java

@@ -438,6 +438,7 @@ public class Time {
      *
      * @param s the string to parse
      * @return true if the resulting time value is in UTC time
+     * @throws android.util.TimeFormatException if s cannot be parsed.
      */
      public boolean parse3339(String s) {
          if (nativeParse3339(s)) {