Don't clean up wallpaper map entry when stopping a user.

Sometimes on quickly stopping and starting a user, a race condition
causes the user entry to disappear, causing crashes in Launcher and
SystemUI. Removing this step, since it doesn't really leave much
residue behind.

Bug: 7434849
Change-Id: Ia188602f1a79f75d307397459c2a03fadee4c722
1 file changed