Fix some preview snapshot tests. (#2574)

* Fix RoomRolesAndPermissionsScreen preview snapshot setup.

* Fix reference snapshot.

ElementX/Sources/Screens/RoomRolesAndPermissionsScreen/RoomRolesAndPermissionsScreenViewModel.swift

@@ -28,10 +28,10 @@ class RoomRolesAndPermissionsScreenViewModel: RoomRolesAndPermissionsScreenViewM
         actionsSubject.eraseToAnyPublisher()
     }
 
-    init(roomProxy: RoomProxyProtocol, userIndicatorController: UserIndicatorControllerProtocol) {
+    init(initialPermissions: RoomPermissions? = nil, roomProxy: RoomProxyProtocol, userIndicatorController: UserIndicatorControllerProtocol) {
         self.roomProxy = roomProxy
         self.userIndicatorController = userIndicatorController
-        super.init(initialViewState: RoomRolesAndPermissionsScreenViewState())
+        super.init(initialViewState: RoomRolesAndPermissionsScreenViewState(permissions: initialPermissions))
         
         // Automatically update the admin/moderator counts.
         roomProxy.membersPublisher

ElementX/Sources/Screens/RoomRolesAndPermissionsScreen/View/RoomRolesAndPermissionsScreen.swift

@@ -126,12 +126,12 @@ struct RoomRolesAndPermissionsScreen: View {
 // MARK: - Previews
 
 struct RoomRolesAndPermissionsScreen_Previews: PreviewProvider, TestablePreview {
-    static let viewModel = RoomRolesAndPermissionsScreenViewModel(roomProxy: RoomProxyMock(with: .init(members: .allMembersAsAdmin)),
+    static let viewModel = RoomRolesAndPermissionsScreenViewModel(initialPermissions: RoomPermissions(powerLevels: .mock),
+                                                                  roomProxy: RoomProxyMock(with: .init(members: .allMembersAsAdmin)),
                                                                   userIndicatorController: UserIndicatorControllerMock())
     static var previews: some View {
         NavigationStack {
             RoomRolesAndPermissionsScreen(context: viewModel.context)
         }
-        .snapshot(delay: 0.2)
     }
 }