FLAVOR in BuildConfig error: cannot find symbol when uses SDK 29 (Android 10)

[adelmojunnior]

[cordova]  > Task :app:compileDebugJavaWithJavac
[cordova]  /Users/adelmo.freitas/workspaces/serpro/irpf-online/frontend/platforms/android/app/src/main/java/br/com/mfdeveloper/cordova/NativeView.java:251: error: cannot find symbol
[cordova]                      if (BuildConfig.FLAVOR == null || BuildConfig.FLAVOR.length() == 0) {
[cordova]                                     ^
[cordova]    symbol:   variable FLAVOR
[cordova]    location: class BuildConfig
[cordova]  /Users/adelmo.freitas/workspaces/serpro/irpf-online/frontend/platforms/android/app/src/main/java/br/com/mfdeveloper/cordova/NativeView.java:251: error: cannot find symbol
[cordova]                      if (BuildConfig.FLAVOR == null || BuildConfig.FLAVOR.length() == 0) {
[cordova]                                                                   ^
[cordova]    symbol:   variable FLAVOR
[cordova]    location: class BuildConfig
[cordova]  /Users/adelmo.freitas/workspaces/serpro/irpf-online/frontend/platforms/android/app/src/main/java/br/com/mfdeveloper/cordova/NativeView.java:270: error: cannot find symbol
[cordova]          callbackContext.success(BuildConfig.FLAVOR);