Add StatsMetadataList proto

        "src/stats_log_util.cpp",

        "src/statscompanion_util.cpp",

        "src/statsd_config.proto",

        "src/statsd_metadata.proto",

        "src/StatsLogProcessor.cpp",

        "src/StatsService.cpp",

        "src/storage/StorageManager.cpp",

/*

 * 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.

 */

syntax = "proto2";

package android.os.statsd.metadata;

message ConfigKey {

  optional int64 config_id = 1;

  optional int32 uid = 2;

}

message Field {

  optional int32 tag = 1;

  optional int32 field = 2;

}

message FieldValue {

  optional Field field = 1;

  oneof value {

    int32 value_int = 2;

    int64 value_long = 3;

    float value_float = 4;

    double value_double = 5;

    string value_str = 6;

    bytes value_storage = 7;

  }

}

message MetricDimensionKey {

  repeated FieldValue dimension_key_in_what = 1;

  repeated FieldValue state_values_key = 2;

}

message AlertMetadata {

  optional int64 alert_id = 1;

  // The earliest time the alert can be fired again in wall clock time.

  optional int32 last_refractory_ends_sec = 2;

  optional MetricDimensionKey dimension_key = 3;

}

// All metadata for a config in statsd

message StatsMetadata {

  optional ConfigKey config_key = 1;

  repeated AlertMetadata alert_metadata = 2;

}

message StatsMetadataList {

  repeated StatsMetadata stats_metadata = 1;

}

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