String getName() {
            return "ISO-2022-CN";
        }
Matching function shared among the 2022 detectors JP, CN and KR
Counts up the number of legal an unrecognized escape sequences in
the sample of text, and computes a score based on the total number &
the proportion that fit the encoding.

@param text            the byte buffer containing text to analyse
@param textLen         the size of the text in the byte.
@param escapeSequences the byte escape sequences to test for.
@return match quality, in the range of 0-100.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-text-module/src/main/java/org/apache/tika/parser/txt/CharsetRecog_2022.java