service: Implement setting the subscription state of a contact

lib/ui/bloc/profile_bloc.dart

@@ -18,6 +18,7 @@ class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
     on<ProfilePageRequestedEvent>(_onProfileRequested);
     on<ConversationUpdatedEvent>(_onConversationUpdated);
     on<AvatarSetEvent>(_onAvatarSet);
+    on<SetSubscriptionStateEvent>(_onSetSubscriptionState);
   }
 
   Future<void> _onProfileRequested(ProfilePageRequestedEvent event, Emitter<ProfileState> emit) async {
@@ -71,4 +72,13 @@ class ProfileBloc extends Bloc<ProfileEvent, ProfileState> {
       awaitable: false
     );
   }
+
+  Future<void> _onSetSubscriptionState(SetSubscriptionStateEvent event, Emitter<ProfileState> emit) async {
+    // TODO: Maybe already emit the state change to have it instant and debounce it until
+    //       everything else is done
+    GetIt.I.get<BackgroundServiceDataSender>().sendData(
+      SetShareOnlineStatusCommand(jid: event.jid, share: event.shareStatus),
+      awaitable: false
+    );
+  }
 }

lib/ui/bloc/profile_event.dart

@@ -35,3 +35,11 @@ class AvatarSetEvent extends ProfileEvent {
 
   AvatarSetEvent(this.path, this.hash);
 }
+
+/// Triggered by the UI when the subscription state should be set
+class SetSubscriptionStateEvent extends ProfileEvent {
+  final String jid;
+  final bool shareStatus;
+
+  SetSubscriptionStateEvent(this.jid, this.shareStatus);
+}