addCheckedItem
Adds an item to the checked list.
Parameters
appInfoData
The data of the app to be added.
Adds items from a GroupAppData to the checked items list.
This function iterates through the appDataList of the provided GroupAppData.
If an item is a CategoryAppData, it's converted and added to the checked items.
If an item is an AppInfoData and is not dimmed, it's converted and added to the checked items.
Parameters
groupAppData
The GroupAppData containing items to be added.