Fix & Update Estonian APNs

Sources:
https://www.emt.ee/pictures/pildid/dokumendid/juhendid/mms_seaded_htc_android.pdf
http://elisa.ee/et/Eraklient/Tugiinfo/Mobiiltelefoni-seadistamine/Android
http://oliver.tele2.ee/tele2-mobiilse-interneti-seaded-android-telefonis/