As part of
DRILL-8301, I spotted code that could be tidied up. The aim of this issue is to reduce the size of DRILL-8301 without introducing changes to the char encodings.
- uses of a pattern like `new String("aaaa")` - IntelliJ and other tools highlight this as unnecessary
- uses of `new String(bytes, StandardCharsets.UTF_8.name())` - better to use `new String(bytes, StandardCharsets.UTF_8)`
- use Base64 encodeToString instead of case where we encode to bytes and then do our own encoding of those bytes to a String
- Change existing code with `Charset.forName("UTF-8")` to use `StandardCharsets.UTF_8`