When three Indonesian teen girls formed a metal band 10 years ago to sing about gender equality and peace over bone-crunching guitars and drums, they could scarcely have dreamed of one day playing at Glastonbury. Yet, a decade later, Voice of Baceprot’s three Muslim women will become the first band from Indonesia to perform at the world-famous festival in Britain this week, where the headliners include Coldplay and Dua Lipa. Their set will mark the latest highlight in a wild career that has seen Firda Kurnia (guitar and vocals), Widi Rahmawati (bass) and Euis Siti Aisah (drums) amass a huge fa…