Remove stale comment and add copyright notice

// Statsd Service jar, which will eventually be put in the statsd mainline apex.

// service-statsd needs to be added to PRODUCT_UPDATABLE_SYSTEM_SERVER_JARS.

// This jar will contain StatsCompanionService

// Copyright (C) 2020 The Android Open Source Project

//

// Licensed under the Apache License, Version 2.0 (the "License");

// you may not use this file except in compliance with the License.

// You may obtain a copy of the License at

//

//     http://www.apache.org/licenses/LICENSE-2.0

//

// Unless required by applicable law or agreed to in writing, software

// distributed under the License is distributed on an "AS IS" BASIS,

// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

// See the License for the specific language governing permissions and

// limitations under the License.

filegroup {

    name: "service-statsd-sources",