zxing
https://mvnrepository.com/artifact/com.google.zxing/core/3.5.3
implementation 'cohttp://m.google.zxing:core:3.5.3'
https://mvnrepository.com/artifact/com.google.zxing/javase/3.5.3
implementation 'cohttp://m.google.zxing:javase:3.5.3'
큐알코드 생성 가능~!