salesforce push notification to salesforce for android
I need to send a push notification to salesforce built in mobile app salesforce for android, I have the app as a connected app to my org.
I have apex code which sends notification when case is created
msg.send('Salesforce for Android',users);
I get error as "NoAccessExpection: common.apex.runtime.impl.ExecutionException: Invalid connected application: Salesforce for Android"