prebuilt: common: etc: copy mtk apns from tetris

File taken as of HEAD [1].

[1]: https://gitlab.e.foundation/e/devices/android_device_nothing_tetris/-/commits/e344b619ab19f4881db024bc8256cdd954831eae/configs/apns-conf.xml

Additionally, changed mvno_type="GID" -> mvno_type="gid" at #L18670