Add hooks for room creation and privacy & security settings screen. (#6270)

Add hooks for the create room and security and privacy screens.

ElementX/Sources/Screens/SecurityAndPrivacyScreen/SecurityAndPrivacyScreenModels.swift

@@ -21,6 +21,7 @@ struct SecurityAndPrivacyScreenViewState: BindableState {
     
     var canonicalAlias: String?
     var isKnockingEnabled: Bool
+    var isPublicAccessAllowed = true
     var isSpace: Bool
     
     var canEditAddress = false
@@ -57,6 +58,11 @@ struct SecurityAndPrivacyScreenViewState: BindableState {
         return options.sorted()
     }
     
+    /// Keeps the option visible on rooms that are already public so the current state is shown.
+    var isAnyoneOptionAvailable: Bool {
+        currentSettings.accessType == .anyone || isPublicAccessAllowed
+    }
+    
     var isSpaceMembersOptionAvailable: Bool {
         currentSettings.accessType.isSpaceMembers || isSpaceMembersOptionSelectable
     }