Reload wallpapers if changed onResume

`IndividualPickerFragment2` launches other fragment for setting
wallpaper and back to it when it's done. Ideally, the lifecycle should be `onResume` and we should check if the wallpaper has changed then reload the UI.

Bug: 268067048
Test: Test: verify the applied wallpaper are checked.
Change-Id: Id8113dbc1b66562df634ea40db396f5528d7504f
1 file changed