Persist WallpaperDescription for static wallpapers

Bug: 380245309
Bug: 395679036
Bug: 421242090
Flag: android.app.update_recents_from_system
Test: cannot test with CTS tests per b/421242090
Test: manually tested persisting and missing id creation
Change-Id: Ieb6d46c67ff5d0ae0e67ac60671ba5ad3c5a8dfb