getAppPickerAdapter
Retrieves the adapter for the app picker view.
This method returns a GridAdapter configured for the grid view. It sets hasStableIds to true for better performance with item animations.
Return
An AbsAdapter instance, specifically a GridAdapter, for the app picker.
Parameters
viewType
The type of the view, although this parameter is not currently used in this implementation. It is kept for consistency with the superclass method signature.