cmdline-tools component is missing
Run path/to/sdkmanager --install "cmdline-tools;latest"
See https://developer.android.com/studio/command-line for more details.

1. Android Studio 설정

Settings > Languages&Frameworks > Android SDK

Android SDK Command-line Tools(latest)를 체크해준다.

2. 안드로이드 라이센스 승인

$ flutter doctor --android-licenses

3. 확인

참고: https://velog.io/@juheesvt/Flutter-%EB%A7%A5-OS%EC%97%90%EC%84%9C-%ED%94%8C%EB%9F%AC%ED%84%B0-%EC%84%A4%EC%B9%98%ED%95%98%EA%B8%B0