Merge cherrypicks of [9944451, 9944452, 9944738, 9944504, 9944659, 9944200,...

import android.annotation.LayoutRes;

import android.annotation.Nullable;

import android.app.ActivityManager;

import android.content.BroadcastReceiver;

import android.content.ComponentName;

import android.content.Context;

import android.content.res.TypedArray;

import android.os.AsyncTask;

import android.os.Bundle;

import android.text.TextUtils;

import android.util.ArraySet;

import android.util.Log;

import android.view.LayoutInflater;

    @Override

    protected void onCreate(@Nullable Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        if (isLockTaskModePinned() && !isSettingsRunOnTop()) {

            Log.w(TAG, "Devices lock task mode pinned.");

            finish();

        }

        final long startTime = System.currentTimeMillis();

        getLifecycle().addObserver(new HideNonSystemOverlayMixin(this));

        }

    }

    private boolean isLockTaskModePinned() {

        final ActivityManager activityManager =

            getApplicationContext().getSystemService(ActivityManager.class);

        return activityManager.getLockTaskModeState() == ActivityManager.LOCK_TASK_MODE_PINNED;

    }

    private boolean isSettingsRunOnTop() {

        final ActivityManager activityManager =

            getApplicationContext().getSystemService(ActivityManager.class);

        final String taskPkgName = activityManager.getRunningTasks(1 /* maxNum */)

            .get(0 /* index */).baseActivity.getPackageName();

        return TextUtils.equals(getPackageName(), taskPkgName);

    }

    /**

     * @return whether or not the enabled state actually changed.

     */