pySim.app: Attempt to retrieve the EID of a SGP.22 / SGP.32 eUICC

... and populate the RuntimeState.identity['EID'] wit it, so other
[future] parts of the system can use it.

Let's also print the EID (if available) from the 'cardinfo' shell
command.

Change-Id: Idc2ea1d9263f39b3dff403e1535a5e6c4e88b26f

pySim/euicc.py

@@ -345,6 +345,13 @@ class CardApplicationISDR(pySim.global_platform.CardApplicationSD):
         else:
             return None
 
+    @staticmethod
+    def get_eid(scc: SimCardCommands) -> str:
+        ged_cmd = GetEuiccData(children=[TagList(decoded=[0x5A])])
+        ged = CardApplicationISDR.store_data_tlv(scc, ged_cmd, GetEuiccData)
+        d = ged.to_dict()
+        return flatten_dict_lists(d['get_euicc_data'])['eid_value']
+
     def decode_select_response(self, data_hex: Hexstr) -> object:
         t = FciTemplate()
         t.from_tlv(h2b(data_hex))