Adds VV attributes on some fields in surveillance camera components (#11453)

Content.Server/SurveillanceCamera/Components/SurveillanceCameraComponent.cs

@@ -10,6 +10,7 @@ public sealed class SurveillanceCameraComponent : Component
     // List of active viewers. This is for bookkeeping purposes,
     // so that when a camera shuts down, any entity viewing it
     // will immediately have their subscription revoked.
+    [ViewVariables]
     public HashSet<EntityUid> ActiveViewers { get; } = new();
 
     // Monitors != Viewers, as viewers are entities that are tied
@@ -18,6 +19,7 @@ public sealed class SurveillanceCameraComponent : Component
     // Monitors are grouped sets of viewers, and may be
     // completely different monitor types (e.g., monitor console,
     // AI, etc.)
+    [ViewVariables]
     public HashSet<EntityUid> ActiveMonitors { get; } = new();
 
     // If this camera is active or not. Deactivating a camera