Update trakt-java [5.7.0 -> 5.7.1].
Update trakt-java [5.7.0 -> 5.7.1].

- Fix regression: crash due to StandardCharsets not being available before API 19.
- https://fabric.io/seriesguide/android/apps/com.battlelancer.seriesguide/issues/58df5d1e0aeb16625b1af31e

UweTrottmann/SeriesGuide,UweTrottmann/SeriesGuide