Figure out back arrow with new react-native-svg version

When updated to Expo SDK 39, back arrow button no longer appears. The update also updated react-native-svg to v12.1.0: https://github.com/react-native-svg/react-native-svg/releases

We rolled the version back to previous (v11.0.1) in order to still have it work, but need to look into having this work in the newer react-native-svg. 