Fixes switch-user -w command.

We handle failures better and exit early if already switched to a current user.

Fixes: 150019926
Test: manual verification
Change-Id: Ib3d70d21cc379f136983f9ddcda31f5bab3f045e
(cherry picked from commit c0bb4e28160dd77495cd431f0f9e40ce3f0e6595)
Merged-In: Ib3d70d21cc379f136983f9ddcda31f5bab3f045e
1 file changed