[flutter] facebook_audience_network 추가하여 빌드 or APK 생성시 - A failure occurred while executing com.android.build.gradle.internal.tasks.R8Task$R8Runnable 오류 발생시

1.
\build\app\outputs\mapping\release\missing_rules.txt. 확인

2.
\android\app\proguard-rules.pro 이동

3.
-dontwarn com.facebook.infer.annotation.Nullsafe 추가