Bug 944232 - [Gaia] To support EAP-SIM and remove AKA, AKA' method.

According to Bug 926341 - [UX]To support WPA-EAP and EAP SIM options in WLAN setting:

* Rename EAP method EAP-SIM to SIM
* Remove EAP method AKA, AKA' since no device to test it
* Remove input SIM PIN
* Enabled unsafe WPA-EAP network. It will be removed once bug 790056 landed.(Platform will re-enable it!)