7082884: Incorrect UTF8 conversion for sequence ED 31
7082883: Incorrect UTF8 conversion for sequence fc 80 80 8f bf bf
Updated UTF8 and added CESU-8 to following the latest Standard
Reviewed-by: alanb
6636319: Encoders should implement isLegalReplacement(byte[] repl)
Optimized new String(byte[], cs/csn) and String.getBytes(cs/csn) for speed and memory consumption in singlebyte case.
Reviewed-by: alanb