Revert^3 "Update the BackgroundThread dependency"

This reverts commit d47fc309e4e3c35acfd3959fd075cc060e9f803b.

Reason for revert: Fixing the revert.
Change-Id: I73ab752c9469cd19778d822d59e7675656bb8854
diff --git a/packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java b/packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java
index 8891b50..6f20adf 100644
--- a/packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java
+++ b/packages/CrashRecovery/services/java/com/android/server/PackageWatchdog.java
@@ -39,13 +39,13 @@
 import android.util.ArrayMap;
 import android.util.ArraySet;
 import android.util.AtomicFile;
-import android.util.BackgroundThread;
 import android.util.LongArrayQueue;
 import android.util.Slog;
 import android.util.Xml;
 
 import com.android.internal.annotations.GuardedBy;
 import com.android.internal.annotations.VisibleForTesting;
+import com.android.internal.os.BackgroundThread;
 import com.android.internal.util.IndentingPrintWriter;
 import com.android.internal.util.XmlUtils;
 import com.android.modules.utils.TypedXmlPullParser;
diff --git a/packages/CrashRecovery/services/java/com/android/util/BackgroundThread.java b/packages/CrashRecovery/services/java/com/android/util/BackgroundThread.java
deleted file mode 100644
index a6ae68f..0000000
--- a/packages/CrashRecovery/services/java/com/android/util/BackgroundThread.java
+++ /dev/null
@@ -1,103 +0,0 @@
-/*
- *  * Copyright (C) 2024 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 android.util;
-
-import android.annotation.NonNull;
-import android.os.Handler;
-import android.os.HandlerThread;
-
-import com.android.internal.annotations.GuardedBy;
-
-import java.util.concurrent.Executor;
-
-/**
- * Thread for asynchronous event processing. This thread is configured as
- * {@link android.os.Process#THREAD_PRIORITY_BACKGROUND}, which means fewer CPU
- * resources will be dedicated to it, and it will "have less chance of impacting
- * the responsiveness of the user interface."
- * <p>
- * This thread is best suited for tasks that the user is not actively waiting
- * for, or for tasks that the user expects to be executed eventually.
- *
- * @see com.android.internal.os.BackgroundThread
- *
- * TODO: b/326916057 depend on modules-utils-backgroundthread instead
- * @hide
- */
-public final class BackgroundThread extends HandlerThread {
-    private static final Object sLock = new Object();
-
-    @GuardedBy("sLock")
-    private static BackgroundThread sInstance;
-    @GuardedBy("sLock")
-    private static Handler sHandler;
-    @GuardedBy("sLock")
-    private static HandlerExecutor sHandlerExecutor;
-
-    private BackgroundThread() {
-        super(BackgroundThread.class.getName(), android.os.Process.THREAD_PRIORITY_BACKGROUND);
-    }
-
-    @GuardedBy("sLock")
-    private static void ensureThreadLocked() {
-        if (sInstance == null) {
-            sInstance = new BackgroundThread();
-            sInstance.start();
-            sHandler = new Handler(sInstance.getLooper());
-            sHandlerExecutor = new HandlerExecutor(sHandler);
-        }
-    }
-
-    /**
-     * Get the singleton instance of this class.
-     *
-     * @return the singleton instance of this class
-     */
-    @NonNull
-    public static BackgroundThread get() {
-        synchronized (sLock) {
-            ensureThreadLocked();
-            return sInstance;
-        }
-    }
-
-    /**
-     * Get the singleton {@link Handler} for this class.
-     *
-     * @return the singleton {@link Handler} for this class.
-     */
-    @NonNull
-    public static Handler getHandler() {
-        synchronized (sLock) {
-            ensureThreadLocked();
-            return sHandler;
-        }
-    }
-
-    /**
-     * Get the singleton {@link Executor} for this class.
-     *
-     * @return the singleton {@link Executor} for this class.
-     */
-    @NonNull
-    public static Executor getExecutor() {
-        synchronized (sLock) {
-            ensureThreadLocked();
-            return sHandlerExecutor;
-        }
-    }
-}
diff --git a/packages/CrashRecovery/services/java/com/android/util/HandlerExecutor.java b/packages/CrashRecovery/services/java/com/android/util/HandlerExecutor.java
deleted file mode 100644
index 948ebcca..0000000
--- a/packages/CrashRecovery/services/java/com/android/util/HandlerExecutor.java
+++ /dev/null
@@ -1,46 +0,0 @@
-/*
- * Copyright (C) 2024 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 android.util;
-
-import android.annotation.NonNull;
-import android.os.Handler;
-
-import java.util.Objects;
-import java.util.concurrent.Executor;
-import java.util.concurrent.RejectedExecutionException;
-
-/**
- * An adapter {@link Executor} that posts all executed tasks onto the given
- * {@link Handler}.
- *
- * TODO: b/326916057 depend on modules-utils-backgroundthread instead
- * @hide
- */
-public class HandlerExecutor implements Executor {
-    private final Handler mHandler;
-
-    public HandlerExecutor(@NonNull Handler handler) {
-        mHandler = Objects.requireNonNull(handler);
-    }
-
-    @Override
-    public void execute(Runnable command) {
-        if (!mHandler.post(command)) {
-            throw new RejectedExecutionException(mHandler + " is shutting down");
-        }
-    }
-}