set Channel Id Override
Overrides the default notification channel that Batch will use for notifications. By default, Batch will manage its own channel, identified by DEFAULT_CHANNEL_ID. After calling this method with a non-null channelId, Batch will stop trying to register its default channel
Note: Please make sure that you've registered this channel using createNotificationChannel or createNotificationChannelGroup
Set to 'null' to revert to the default channel.