I am creating a game, how to implement a pause menu?

I am creating a game in Android studio using the SurfaceView class that is instantiated in MainActivity and a thread that is instantiated in SurfaceView, the problem is when I turn the screen on and it goes back to the initial state, ie it does not save the positions / state, in real, wanted to know how to implement a pause menu ...

IMAGES

Before pressing the off screen button (I tapped the screen to jump the [circle / bird])

afterpressingtheonscreenbutton(the[circle/bird]returnstothefallposition)

Source code below

MainActivity

public class MainActivity extends Activity {

private Game game;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    FrameLayout container = findViewById(R.id.container);
    game = new Game(this);
    container.addView(game);
}
@Override
protected void onPause() {
    super.onPause();
    game.cancela();
}

@Override
protected void onResume() {
    super.onResume();
    game.inicia();
    new Thread(game).start();
      }
   }

Game Class

public class Game extends SurfaceView implements Runnable,View.OnTouchListener{
private final SurfaceHolder holder = getHolder();
private boolean isRunning = true;
private Player passaro;
private Bitmap background;
private Tela tela;


public Game(Context context) {
    super(context);
    setOnTouchListener(this);
    inicializaElementos();
}

private void inicializaElementos() {
    tela = new Tela(getContext());
    this.passaro = new Player();
    Bitmap back = BitmapFactory.decodeResource(getResources(),
            R.drawable.background);
    this.background = Bitmap.createScaledBitmap(back,
            tela.getLargura(), tela.getAltura(), false);

}

public void update() {
    passaro.update();
}

@Override
public void run() {
    while (isRunning) {
        if (!holder.getSurface().isValid()) continue;
        //Neste loop vamos gerenciar os elementos do Jumper.
        //
        Canvas canvas = holder.lockCanvas();
        update();
        //
        //Aqui vamos desenhar os elementos do jogo!
        canvas.drawBitmap(background, 0, 0, null);
        passaro.desenhaNo(canvas);
        //
        holder.unlockCanvasAndPost(canvas);
    }
}

public void cancela() {
    this.isRunning = false;
}

public void inicia() {
    this.isRunning = true;
}

@Override
public boolean onTouch(View view, MotionEvent motionEvent) {
    passaro.pula();
    return false;
     }
  }

Player class (bird)

public class Player {
private static final Paint vermelho = Cores.getCorDoPassaro();
private int x;
private static final int RAIO = 50;
private int y, velY = 0;
private int gravity = 1;
//private float fric = 0.3f;
//private boolean jump = false;

public Player() {
    this.y = 0;
    this.x = 100;
}

public void pula() {
    this.velY = -30;
    cai();
}

public void update() {
    if (chao()) {
        this.y = 1080 - RAIO;
        this.velY = 0;//(int) (-this.velY*this.fric);
    } else {
        cai();
    }
}


private boolean chao() {
    if (this.y >= 1080 - RAIO) {
        return true;
    }
    return false;
}

private void cai() {
    this.y += this.velY;
    this.velY += this.gravity;
}


public void desenhaNo(Canvas canvas) {
    canvas.drawCircle(x, y, RAIO, vermelho);
   }
}

Screen Class

public class Tela {
private DisplayMetrics metrics;

public Tela(Context context) {
    WindowManager wm = (WindowManager) context.getSystemService(
            Context.WINDOW_SERVICE);
    Display display = wm.getDefaultDisplay();
    metrics = new DisplayMetrics();
    display.getMetrics(metrics);
}

public int getAltura() {
    return metrics.heightPixels;
}

public int getLargura() {
    return metrics.widthPixels;
   }
}

Colors Class

public class Cores {
public static Paint getCorDoPassaro() {
    Paint vermelho = new Paint();
    vermelho.setColor(0xFFFF0000);
    return vermelho;
   }
}