Remove unnecessary extra <config-file> block which can lead to race condition

Author: dpa99c

plugin.xml

@@ -30,8 +30,6 @@ xmlns:android="http://schemas.android.com/apk/res/android">
 		</config-file>
 		<config-file target="AndroidManifest.xml" parent="/manifest/application">
 			<service android:enabled="true" android:exported="false" android:name="com.google.android.gms.measurement.AppMeasurementService" />
-		</config-file>
-		<config-file target="AndroidManifest.xml" parent="/manifest/application">
 			<service android:name="org.apache.cordova.firebase.FirebasePluginMessagingService">
 				<intent-filter>
 					<action android:name="com.google.firebase.MESSAGING_EVENT"/>