Fix accessibility for dialogs

compose/ui/ui/src/uikitMain/kotlin/androidx/compose/ui/platform/Accessibility.uikit.kt

@@ -1091,8 +1091,10 @@ internal class AccessibilityMediator(
             while (true) {
                 invalidationChannel.receive()
 
+                // Wait until all changes in the accessibility tree have been completed
+                // and consume all invalidations
+                delay(1)
                 while (invalidationChannel.tryReceive().isSuccess) {
-                    // Do nothing, just consume the channel
                     // Workaround for the channel buffering two invalidations despite the capacity of 1
                 }