fix-occupancy-devices-bug (#318)

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## Description

handle more cases when decoding analytics devices.

## 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

lib/pages/analytics/models/analytics_device.dart

@@ -39,8 +39,12 @@ class AnalyticsDevice {
           ? ProductDevice.fromJson(json['productDevice'] as Map<String, dynamic>)
           : null,
       spaceUuid: json['spaceUuid'] as String?,
-      latitude: json['lat'] != null ? double.parse(json['lat'] as String? ?? '0.0') : null,
-      longitude: json['lon'] != null ? double.parse(json['lon'] as String? ?? '0.0') : null,
+      latitude: json['lat'] != null && json['lat'] != ''
+          ? double.tryParse(json['lat']?.toString() ?? '0.0')
+          : null,
+      longitude: json['lon'] != null && json['lon'] != ''
+          ? double.tryParse(json['lon']?.toString() ?? '0.0')
+          : null,
     );
   }
 }