Force remove DreamActivity from system server

package com.android.server.dreams;

import static android.app.WindowConfiguration.ACTIVITY_TYPE_DREAM;

import android.app.ActivityTaskManager;

import android.content.ComponentName;

import android.content.Context;

import android.content.Intent;

import android.service.dreams.DreamService;

import android.service.dreams.IDreamService;

import android.util.Slog;

import android.view.IWindowManager;

import android.view.WindowManagerGlobal;

import com.android.internal.logging.MetricsLogger;

import com.android.internal.logging.nano.MetricsProto.MetricsEvent;

    private final Context mContext;

    private final Handler mHandler;

    private final Listener mListener;

    private final IWindowManager mIWindowManager;

    private final ActivityTaskManager mActivityTaskManager;

    private long mDreamStartTime;

    private String mSavedStopReason;

        mContext = context;

        mHandler = handler;

        mListener = listener;

        mIWindowManager = WindowManagerGlobal.getWindowManagerService();

        mActivityTaskManager = mContext.getSystemService(ActivityTaskManager.class);

        mCloseNotificationShadeIntent = new Intent(Intent.ACTION_CLOSE_SYSTEM_DIALOGS);

        mCloseNotificationShadeIntent.putExtra("reason", "dream");

    }

            }

            oldDream.releaseWakeLockIfNeeded();

            mActivityTaskManager.removeRootTasksWithActivityTypes(new int[] {ACTIVITY_TYPE_DREAM});

            mHandler.post(() -> mListener.onDreamStopped(oldDream.mToken));

        } finally {

            Trace.traceEnd(Trace.TRACE_TAG_POWER);