/FA indicates these are FirebaseAnalytics messages. Firebase tries to do a lot automatically for you, and that includes some recommended logging. I suspect you recently added the Firebase and the related plugin to your app.
You customize this logging if you like. Maybe you just want to turn it off? Anyway, it doesn’t appear anything is wrong that you need to worry about.
Documentation for customizing the FA logs are: firebase.google.com/docs/analytics/android/events
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