Clean up NetworkStatsSummaryLoader

Migrated to Kotlin coroutines.

Bug: 290856342
Test: presubmit
Change-Id: I87ff6212aa08b0ecded199e0503b573b267605f2
diff --git a/packages/SettingsLib/src/com/android/settingslib/net/NetworkStatsSummaryLoader.java b/packages/SettingsLib/src/com/android/settingslib/net/NetworkStatsSummaryLoader.java
deleted file mode 100644
index 54d5c3d..0000000
--- a/packages/SettingsLib/src/com/android/settingslib/net/NetworkStatsSummaryLoader.java
+++ /dev/null
@@ -1,107 +0,0 @@
-/*
- * Copyright (C) 2018 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.
- */
-
-package com.android.settingslib.net;
-
-import android.app.usage.NetworkStats;
-import android.app.usage.NetworkStatsManager;
-import android.content.Context;
-import android.net.NetworkTemplate;
-import android.util.Log;
-
-import androidx.loader.content.AsyncTaskLoader;
-
-/**
- * Loader for retrieving the network stats summary for all UIDs.
- */
-public class NetworkStatsSummaryLoader extends AsyncTaskLoader<NetworkStats> {
-
-    private static final String TAG = "NetworkDetailLoader";
-    private final NetworkStatsManager mNetworkStatsManager;
-    private final long mStart;
-    private final long mEnd;
-    private final NetworkTemplate mNetworkTemplate;
-
-    private NetworkStatsSummaryLoader(Builder builder) {
-        super(builder.mContext);
-        mStart = builder.mStart;
-        mEnd = builder.mEnd;
-        mNetworkTemplate = builder.mNetworkTemplate;
-        mNetworkStatsManager = (NetworkStatsManager)
-                builder.mContext.getSystemService(Context.NETWORK_STATS_SERVICE);
-    }
-
-    @Override
-    protected void onStartLoading() {
-        super.onStartLoading();
-        forceLoad();
-    }
-
-    @Override
-    public NetworkStats loadInBackground() {
-        try {
-            return mNetworkStatsManager.querySummary(mNetworkTemplate, mStart, mEnd);
-        } catch (RuntimeException e) {
-            Log.e(TAG, "Exception querying network detail.", e);
-            return null;
-        }
-    }
-
-    @Override
-    protected void onStopLoading() {
-        super.onStopLoading();
-        cancelLoad();
-    }
-
-    @Override
-    protected void onReset() {
-        super.onReset();
-        cancelLoad();
-    }
-
-    public static class Builder {
-        private final Context mContext;
-        private long mStart;
-        private long mEnd;
-        private NetworkTemplate mNetworkTemplate;
-
-        public Builder(Context context) {
-            mContext = context;
-        }
-
-        public Builder setStartTime(long start) {
-            mStart = start;
-            return this;
-        }
-
-        public Builder setEndTime(long end) {
-            mEnd = end;
-            return this;
-        }
-
-        /**
-         * Set {@link NetworkTemplate} for builder
-         */
-        public Builder setNetworkTemplate(NetworkTemplate template) {
-            mNetworkTemplate = template;
-            return this;
-        }
-
-        public NetworkStatsSummaryLoader build() {
-            return new NetworkStatsSummaryLoader(this);
-        }
-    }
-}