Android11 Launcher添加网格布局设置（3x3,4x4,5x5）

需求：长按workspace空白处，Home Settings添加launcher界面布局3x3，4x4，5x5设置

添加布局文件，当网格设置关闭时，所有设置项置灰不允许点击

• 源码：/vendor/mediatek/proprietary/packages/apps/Launcher3/res/xml/launcher_preferences.xml

 // add for grid options settings
 <PreferenceCategory 
        android:key="grid_options_category"
        android:order="100"