Add OPENSWIFTUI_LINK_BACKLIGHTSERVICES guards to UIKit hosting views

Author: Kyle-Ye

Sources/OpenSwiftUI/Integration/Hosting/UIKit/Controller/UIHostingController.swift

@@ -8,7 +8,9 @@ public import UIKit
 open class UIHostingController<Content>: UIViewController where Content : View {
     var host: _UIHostingView<Content>
 
+    #if OPENSWIFTUI_LINK_BACKLIGHTSERVICES
     var alwaysOnBridge: AlwaysOnBridge<Content>?
+    #endif
 
     override open dynamic var keyCommands: [UIKeyCommand]? {
         // TODO

Sources/OpenSwiftUI/Integration/Hosting/UIKit/View/UIHostingView.swift

@@ -284,9 +284,11 @@ open class _UIHostingView<Content>: UIView, XcodeViewDebugDataProvider where Con
         if shouldDisableUIKitAnimations,
            Semantics.TraitCollectionAnimations.isEnabled,
            var transaction = Transaction.currentUIViewTransaction(canDisableAnimations: true) {
+            #if OPENSWIFTUI_LINK_BACKLIGHTSERVICES
             if let viewController, let alwaysOnBridge = viewController.alwaysOnBridge {
                 alwaysOnBridge.configureTransaction(&transaction)
             }
+            #endif
             viewGraph.emptyTransaction(transaction)
         }
     }
@@ -567,7 +569,9 @@ extension _UIHostingView {
             let box: WeakBox<UIView> = WeakBox(host)
             let boxAttr = Attribute(value: box)
             // inputs[UIKitHostContainerFocusItemInput.self] = boxAttr
+            #if OPENSWIFTUI_LINK_BACKLIGHTSERVICES
             inputs.textAlwaysOnProvider = OpenSwiftUITextAlwaysOnProvider.self
+            #endif
             // navigationBridge?.updateViewInputs(&inputs)
         }
     }