Update value AKUSetScreenSize when set fullscreen mode

```C++
* Before enterFullscreenMode
verticalResolution:     768
horizontalResolution:   1366
---------------------------------
* After enterFullscreenMode
verticalResolution:     600
horizontalResolution:   800
---------------------------------
* Before exitFullscreenMode
verticalResolution:     600
horizontalResolution:   800
---------------------------------
* After exitFullscreenMode
verticalResolution:     768
horizontalResolution:   1366
---------------------------------
```