Minimal version of the LTE downgrade analyzer

This also renames the lte_parser crate to telcom_parser, since it'll
handle any 2G or 3G parsing going forward.

telcom-parser/tests/lte_rrc_test.rs

@@ -0,0 +1,17 @@
+use telcom_parser::lte_rrc::BCCH_DL_SCH_Message;
+use asn1_codecs::{uper::UperCodec, PerCodecData};
+
+fn hex_to_bin(hex: &str) -> Vec<u8> {
+    (0..hex.len())
+        .step_by(2)
+        .map(|i| u8::from_str_radix(&hex[i..i+2], 16).unwrap())
+        .collect()
+}
+
+#[test]
+fn test() {
+    let data = hex_to_bin("484c469010600018fd1a9207e22103108ac21bdc09802292cdd20000");
+    let mut asn_data = PerCodecData::from_slice_uper(&data);
+    let sib1 = BCCH_DL_SCH_Message::uper_decode(&mut asn_data);
+    dbg!(&sib1);
+}