ParsePush.subscribeInBackground not updating the channel list?

I am using ParsePush.subscribeInBackground in android to subscribe to channels but the channel list in the data page of parse web console does not get updated. However, the channel list is locally updated on the device. Following is the code I have written -

ParsePush.subscribeInBackground("Giants");
ParseInstallation installation = ParseInstallation.getCurrentInstallation();
List<String> subscribedChannels = installation.getList("channels");
Log.d("list",(subscribedChannels.toString()));

The list in log.d does print 'Giants', but it is not added in the channel list on the web console. Please help me. I don't know what I am doing wrong. Thank you