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Mysterious Android version code = configured value plus 2000

If you are building Flutter app and shows app version in-app for users to see (mostly testers). You may run into a weird issue that the version code is different from the configured value. E.g. if you run `flutter build --build-number=1234` it will show up as `3234`, 123 shows up as `2123`... What the hell is happening?

flutter.gradle#L864-L876 is the culprit.


Basically `--split-per-abi` will increase the version code number by 1000, 2000, 3000, etc. as seen above. If you don't want that behavior, just build one single fat APK.


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