ext_iconv cannot be cross-compiled on Android
We need to perform some special steps to make sure iconv is cross-compiled for Android, since is uses automake :(
See a note here: https://invent.kde.org/dkazakov/krita-deps-management/-/blob/master/latest/krita-deps.yml?ref_type=heads#L68
Instructions on how to build iconv for Android: https://medium.com/@zw3rk/building-iconv-for-android-e3581a52668f
Until it is recovered, exiv2 will not convert character encoding in files metadata and there will be bugs with that :)