Show uninstall for all users option menu in app info.

- when there is only 1 user installed the app, also check if it is
installed by the current user or by other user to determine whether or
not to show the uninstall for all button.

Change-Id: I1eecb13a7748c92159cb0626e2b6fe1ed6987d15
Fix: 34760157
Test: make RunSettingsRoboTests