Fix crash issue

app/src/google/java/org/traccar/manager/ManagerMessagingService.kt

@@ -19,6 +19,7 @@ import android.annotation.SuppressLint
 import android.app.NotificationManager
 import android.app.PendingIntent
 import android.content.Intent
+import android.os.Build
 import androidx.core.app.NotificationCompat
 import com.google.firebase.messaging.FirebaseMessagingService
 import com.google.firebase.messaging.RemoteMessage
@@ -28,7 +29,12 @@ class ManagerMessagingService : FirebaseMessagingService() {
     @SuppressLint("UnspecifiedImmutableFlag")
     override fun onMessageReceived(remoteMessage: RemoteMessage) {
         super.onMessageReceived(remoteMessage)
-        val pendingIntent = PendingIntent.getActivity(this, 0, Intent(this, MainActivity::class.java), PendingIntent.FLAG_ONE_SHOT)
+        val flags = if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+            PendingIntent.FLAG_ONE_SHOT or PendingIntent.FLAG_IMMUTABLE
+        } else {
+            PendingIntent.FLAG_ONE_SHOT
+        }
+        val pendingIntent = PendingIntent.getActivity(this, 0, Intent(this, MainActivity::class.java), flags)
         val builder = NotificationCompat.Builder(this, getString(R.string.notification_channel_id))
             .setSmallIcon(R.drawable.ic_stat_notify)
             .setContentTitle(getString(R.string.app_name))