Trouble migrating from GCM to FCM

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I'm trying to migrate the app from GCM to FCM.

I followed the guide and went through the troubleshooting page with no success.

When sending through the Firebase console:

• If the app is not running or not in the foregrounded, I receive the push notification.
• If the app is in the foreground, I receive "Ignoring push: {testtag=1}" message (where testtag is just an arbitrary tag set) in logcat and nothing happens.

When sending through the UrbanAirship console:

• Nothing happens.