There are some pretty intricate rules about how GSM and E-UTRAN are
encoded, let's make sure we fully support both as per 3GPP TS 31.102
Release 17. As part of this, switch to a sorted list of access technologies,
in order to have a defined order. This makes comparing in unit tests
much easier. However, it also means that we need to sort the set
when printing the list of AcT in pySim-read to generate deterministic
output.
Change-Id: I398ac2a2527bd11e9c652e49fa46d6ca8d334b88
542dbf6771