Fix manifest

app/src/google/AndroidManifest.xml

@@ -21,7 +21,7 @@
             android:name="com.google.firebase.messaging.default_notification_icon"
             android:resource="@drawable/ic_stat_notify" />
 
-        <service android:name=".ManagerMessagingService">
+        <service android:exported="false" android:name=".ManagerMessagingService">
             <intent-filter>
                 <action android:name="com.google.firebase.MESSAGING_EVENT" />
             </intent-filter>