[FE] Disable AC Control Button When AC is Off (#308)

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## Jira Ticket
[SP-1387](https://syncrow.atlassian.net/browse/SP-1387)

## Description

fix bug to dont stack snackbars

## Type of Change

<!--- Put an `x` in all the boxes that apply: -->

- [ ] ✨ New feature (non-breaking change which adds functionality)
- [x] 🛠️ Bug fix (non-breaking change which fixes an issue)
- [ ] ❌ Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] 🧹 Code refactor
- [ ] ✅ Build configuration change
- [ ] 📝 Documentation
- [ ] 🗑️ Chore 


[SP-1387]:
https://syncrow.atlassian.net/browse/SP-1387?atlOrigin=eyJpIjoiNWRkNTljNzYxNjVmNDY3MDlhMDU5Y2ZhYzA5YTRkZjUiLCJwIjoiZ2l0aHViLWNvbS1KU1cifQ

lib/pages/device_managment/all_devices/widgets/device_managment_body.dart

@@ -111,6 +111,8 @@ class DeviceManagementBody extends StatelessWidget with HelperResponsiveLayout {
                                     onPressed: isControlButtonEnabled
                                         ? () {
                                             if (isAnyDeviceOffline) {
+                                              ScaffoldMessenger.of(context)
+                                                  .clearSnackBars();
                                               ScaffoldMessenger.of(context)
                                                   .showSnackBar(
                                                 const SnackBar(