Sort most recent last heard on device details

lib/views/device_detail_view.dart

@@ -464,7 +464,9 @@ class _DeviceDetailViewState extends State<DeviceDetailView> {
             ],
           ),
           const SizedBox(height: 16),
-          ..._lastHeardItems.map((item) => Card(
+          ...(_lastHeardItems.toList()
+                ..sort((a, b) => b.timestamp.compareTo(a.timestamp)))
+              .map((item) => Card(
                 margin: const EdgeInsets.only(bottom: 8),
                 child: ListTile(
                   leading: CircleAvatar(