Android scrobbling support (Last.fm)

Request for Last.fm scrobbling support in the Android port of VLC.

Ticket created in response to this topic: https://forum.videolan.org/viewtopic.php?f=35&t=120646

As VLC works as a great replacement to the stock Android music player, it would be a worthy addition to the have the ability to scrobble tracks on-the-go.

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