AppArmor is a Linux Security Module, it has to be enabled in the Kernel, the package you are downloading from apt will not work if it is not enabled.
I successfully managed to enable it by recompiling the Kernel with the module enabled.
To recompile the kernel it is possible to follow the official guide https://www.raspberrypi.org/documentati ... uilding.md
During the configuration of the Kernel you have to enable the module, these options have to be enabled:
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According to https://wiki.archlinux.org/index.php/AppArmor
I hope it was clear, if not, just ask