fix: fix dfu id mismatch because stale notification

test/service/firmware_update_service_test.dart

@@ -307,6 +307,33 @@ void main() {
       await transport.dispose();
     });
 
+    test('ignores stale previous-session status while waiting for START',
+        () async {
+      final image = _validImage(80);
+      final transport = _FakeFirmwareUpdateTransport(
+        totalBytes: image.length,
+        staleStartStatusSessionId: 20,
+      );
+      final service = FirmwareUpdateService(
+        transport: transport,
+        defaultStatusTimeout: const Duration(milliseconds: 100),
+      );
+
+      final result = await service.startUpdate(
+        imageBytes: image,
+        sessionId: 21,
+      );
+
+      expect(result.isOk(), isTrue);
+      expect(
+          transport.controlWrites.first.first, universalShifterDfuOpcodeStart);
+      expect(transport.dataWrites.first[0], 21);
+      expect(service.currentProgress.state, DfuUpdateState.completed);
+
+      await service.dispose();
+      await transport.dispose();
+    });
+
     test('fails with bootloader status error on rejected START', () async {
       final image = _validImage(40);
       final transport = _FakeFirmwareUpdateTransport(
@@ -410,6 +437,7 @@ class _FakeFirmwareUpdateTransport implements FirmwareUpdateTransport {
     this.suppressFirstDataStatus = false,
     this.failDataWriteAtOffsetOnce,
     this.resetSessionOnRecoveryStatus = false,
+    this.staleStartStatusSessionId,
     this.suppressFinishStatus = false,
     this.disconnectAfterFinish = true,
     this.finishStatusCode = DfuBootloaderStatusCode.ok,
@@ -425,6 +453,7 @@ class _FakeFirmwareUpdateTransport implements FirmwareUpdateTransport {
   final bool suppressFirstDataStatus;
   final int? failDataWriteAtOffsetOnce;
   final bool resetSessionOnRecoveryStatus;
+  final int? staleStartStatusSessionId;
   final bool suppressFinishStatus;
   final bool disconnectAfterFinish;
   final DfuBootloaderStatusCode finishStatusCode;
@@ -502,6 +531,10 @@ class _FakeFirmwareUpdateTransport implements FirmwareUpdateTransport {
     if (opcode == universalShifterDfuOpcodeStart) {
       _sessionId = payload[17];
       _expectedOffset = 0;
+      final staleSessionId = staleStartStatusSessionId;
+      if (staleSessionId != null) {
+        _scheduleStatus(DfuBootloaderStatusCode.ok, staleSessionId, 0);
+      }
       _scheduleStatus(startStatusCode, _sessionId, 0);
     } else if (opcode == universalShifterDfuOpcodeGetStatus) {
       if (resetSessionOnRecoveryStatus && _connectCount > 1) {