[android] how to update placement of home screen in launcher ?

file: <aosp>/packages/apps/Launcher2/res/xml-sw720dp/default_workspace.xml

<favorite
        launcher:packageName="com.android.music"
        launcher:className="com.android.music.MusicBrowserActivity"
        launcher:screen="2"
        launcher:x="1"
        launcher:y="1" />