Back-port ag/2514922

    <uses-permission android:name="android.permission.READ_INSTALL_SESSIONS" />

    <uses-permission android:name="android.permission.UPDATE_APP_OPS_STATS" />

    <uses-permission android:name="android.permission.KILL_UID" />

    <uses-permission android:name="android.permission.HIDE_NON_SYSTEM_OVERLAY_WINDOWS" />

    <application android:label="@string/app_name"

            android:allowBackup="false"

 */

package com.android.packageinstaller.permission.ui;

import static android.view.WindowManager.LayoutParams.PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.MotionEvent;

public class OverlayTouchActivity extends Activity {

        return mObscuredTouch;

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        getWindow().addPrivateFlags(PRIVATE_FLAG_HIDE_NON_SYSTEM_OVERLAY_WINDOWS);

        super.onCreate(savedInstanceState);

    }

    @Override

    public boolean dispatchTouchEvent(MotionEvent event) {

        mObscuredTouch = (event.getFlags() & (MotionEvent.FLAG_WINDOW_IS_OBSCURED