[audiofileplayer] Provide more detailed error data

[mr-mmmmore]

Hey,

I find this plugin underrated as it is one of the rare ones that provides true background audio as well as local and remote files playing. So congrats to the developers and thank you for the great job, it is precious!

One problem I encounter is that when the player doesn't manage to play a remote string, the error message is still the same and isn't much helpful to understand what is wrong.

It would be great if it were possible to provide in some way the error reported by the host system.

Thanks,
mmmm

[monkeyswarm]

Please detail what OS, OS version you are using.
I'm guessing it is Android, as Android's remote audio loading error messages are effectively useless.

[mr-mmmmore]

I am mostly debugging on a Huawei P20 Lite with Android 8.