Remove the RoomDirectorySearch feature flag and enable the feature by default.

ElementX/Sources/Screens/StartChatScreen/View/StartChatScreen.swift

@@ -51,9 +51,7 @@ struct StartChatScreen: View {
     @ViewBuilder
     private var mainContent: some View {
         createRoomSection
-        if context.viewState.isRoomDirectoryEnabled {
-            roomDirectorySearch
-        }
+        roomDirectorySearch
         inviteFriendsSection
         joinRoomByAddressSection
         usersSection
@@ -157,7 +155,6 @@ struct StartChatScreen: View {
 struct StartChatScreen_Previews: PreviewProvider, TestablePreview {
     static let viewModel = {
         let appSettings = AppSettings()
-        appSettings.publicSearchEnabled = true
         let userSession = UserSessionMock(.init(clientProxy: ClientProxyMock(.init(userID: "@userid:example.com"))))
         let userDiscoveryService = UserDiscoveryServiceMock()
         userDiscoveryService.searchProfilesWithReturnValue = .success([.mockAlice])