apns-conf-mtk: Use the proper settings for SFR (MCC 208 with MNC 10)

* This is a mix of SFR [1], RED by SFR [2] and Prixtel [3] APN configs due to minor differences between them.
* The xcap type have been added due to it being present on mutliple apns-config.xml from different stock ROMs (OneUI, OOS, MyOS)

[1]: https://assistance.sfr.fr/tel-mobile/utilisation-param/parametrer-apn-sfr-mobile.html
[2]: https://assistance.red-by-sfr.fr/configurer-utiliser-mobile/internet-mms.html
[3]: https://assistance.prixtel.com/questions/900239-configurer-internet-mms-smartphone

Test: 4G and MMS are now available for Prixtel
Change-Id: I2de4d0e0775ce71b715389075333ca1c5902f244