Update more uses of registration build flag

Author: pete-signal

Signal/Registration/UserInterface/RegistrationSplashViewController.swift

@@ -140,7 +140,7 @@ public class RegistrationSplashViewController: OWSViewController, OWSNavigationC
         continueButton.accessibilityIdentifier = "registration.splash.continueButton"
 
         let largeButtonsContainer: UIView
-        if FeatureFlags.Backups.supported {
+        if FeatureFlags.Backups.alwaysShowSettings {
             let restoreOrTransferButton = UIButton(
                 configuration: .largeSecondary(title: OWSLocalizedString(
                     "ONBOARDING_SPLASH_RESTORE_OR_TRANSFER_BUTTON_TITLE",

Signal/src/ViewControllers/HomeView/ConversationSplitViewController.swift

@@ -739,7 +739,7 @@ private class NoSelectedConversationViewController: OWSViewController {
 extension ConversationSplitViewController: DeviceTransferServiceObserver {
     override func viewWillAppear(_ animated: Bool) {
         super.viewWillAppear(animated)
-        if !FeatureFlags.Backups.supported {
+        if !FeatureFlags.Backups.alwaysShowSettings {
             AppEnvironment.shared.deviceTransferServiceRef.addObserver(self)
             AppEnvironment.shared.deviceTransferServiceRef.startListeningForNewDevices()
         }
@@ -756,7 +756,7 @@ extension ConversationSplitViewController: DeviceTransferServiceObserver {
     override func viewWillDisappear(_ animated: Bool) {
         super.viewWillDisappear(animated)
 
-        if !FeatureFlags.Backups.supported {
+        if !FeatureFlags.Backups.alwaysShowSettings {
             AppEnvironment.shared.deviceTransferServiceRef.removeObserver(self)
             AppEnvironment.shared.deviceTransferServiceRef.stopListeningForNewDevices()
         }