Add HiFi streams

[johangirod]

Apparently, RadioFrance provides HiFi streams in AAC encoding (as seen in this repo for instance). It would be great to have the possibility to opt-in for HiFi streams when supported. Those would be :

{
   "fiprock": "https://icecast.radiofrance.fr/fiprock-hifi.aac"
    "fipjazz": "https://icecast.radiofrance.fr/fipjazz-hifi.aac"
    "fipgroove": "https://icecast.radiofrance.fr/fipgroove-hifi.aac"
    "fippop": "https://icecast.radiofrance.fr/fippop-hifi.aac"
    "fipelectro": "https://icecast.radiofrance.fr/fipelectro-hifi.aac"
    "fipworld": "https://icecast.radiofrance.fr/fipworld-hifi.aac"
    "fipreggae": "https://icecast.radiofrance.fr/fipreggae-hifi.aac"
    "fipnouveautes": "https://icecast.radiofrance.fr/fipnouveautes-hifi.aac"
    "fip": "https://icecast.radiofrance.fr/fip-hifi.aac"
}