fake activities for lib/litter/status/litter_status_tab.dart's _buildRecentActivitySection
final fakeActivities = List<LitterRobotActivity>.from(
LitterRobotUnitStatus.values.map(
(unitStatus) => LitterRobotActivity(
litterRobotId: 'x',
unitStatus: unitStatus,
timestamp: DateTime.now()
.subtract(Duration(seconds: Random().nextInt(60 * 60 * 8))),