feat: update optimizations

test/service/firmware_update_service_test.dart

@@ -28,6 +28,7 @@ void main() {
         'enterBootloader',
         'waitForAppDisconnect',
         'connectToBootloader',
+        'optimizeBootloaderConnection',
         'negotiateMtu',
         'readStatus',
         'waitForBootloaderDisconnect',
@@ -68,6 +69,7 @@ void main() {
       expect(result.isOk(), isTrue);
       expect(transport.steps, [
         'isConnectedToBootloader',
+        'optimizeBootloaderConnection',
         'negotiateMtu',
         'readStatus',
         'waitForBootloaderDisconnect',
@@ -162,6 +164,12 @@ void main() {
         transport.steps.where((step) => step == 'connectToBootloader').length,
         2,
       );
+      expect(
+        transport.steps
+            .where((step) => step == 'optimizeBootloaderConnection')
+            .length,
+        2,
+      );
       expect(
         transport.controlWrites
             .where((write) => write.first == universalShifterDfuOpcodeGetStatus)
@@ -344,9 +352,16 @@ class _FakeFirmwareUpdateTransport implements FirmwareUpdateTransport {
     return Ok(null);
   }
 
+  @override
+  Future<Result<void>> optimizeBootloaderConnection() async {
+    steps.add('optimizeBootloaderConnection');
+    return Ok(null);
+  }
+
   @override
   Future<Result<int>> negotiateMtu({required int requestedMtu}) async {
     steps.add('negotiateMtu');
+    expect(requestedMtu, universalShifterDfuPreferredMtu);
     return Ok(128);
   }