Use coroutines for main thread execution

- Simplified thread handling with Kotlin coroutines to ensure dismissal code always runs on the main thread

Author: jennantilla

OneSignalSDK/onesignal/in-app-messages/src/main/java/com/onesignal/inAppMessages/internal/InAppMessagesManager.kt

@@ -45,6 +45,9 @@ import com.onesignal.user.internal.subscriptions.ISubscriptionManager
 import com.onesignal.user.internal.subscriptions.SubscriptionModel
 import com.onesignal.user.subscriptions.IPushSubscription
 import com.onesignal.user.subscriptions.ISubscription
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
 import kotlinx.coroutines.sync.Mutex
 import kotlinx.coroutines.sync.withLock
 
@@ -114,7 +117,9 @@ internal class InAppMessagesManager(
 
             // If paused is true and an In-App Message is showing, dismiss it
             if (value && _state.inAppMessageIdShowing != null) {
-                _displayer.dismissCurrentInAppMessage()
+                GlobalScope.launch(Dispatchers.Main) {
+                    _displayer.dismissCurrentInAppMessage()
+                }
             }
 
             if (!value) {