Legend "...xx entries" text is not localized

The text that shows "...89 entries" when the number of entries has exceeded the symbolLimit number of entries for a legend is not localizable.

https://github.com/vega/vega/blob/398933a49e8249a41ad8aee65f99935346b67e71/packages/vega-encode/src/LegendEntries.js#L85