xmr: add version fields to check for protocol compatibility

- safe check in case hard fork number increases without Trezor being patched to that version. Same for monero software version - if major version update is detected, T may warn to do only in own risk without updating Trezor firmware compatible with new versions

protob/messages-monero.proto

@@ -138,6 +138,8 @@ message MoneroTransactionInitRequest {
         optional MoneroTransactionRsigData rsig_data = 11;
         repeated uint32 integrated_indices = 12;
         optional uint32 client_version = 13;  // connected client version
+        optional uint32 hard_fork = 14;       // transaction hard fork number
+        optional bytes monero_version = 15;   // monero software version
     }
 }