Only create resources for the non-system user

- It is expensive to create resources, so skip recreating
  them for the system user (they already exist for the
  system ui context). We only recreate resources when
  switching to a non-system user.

Bug: 131856992
Test: Manual
Change-Id: I5353fd336134f98e1d48bbf705ea30310447bccd
1 file changed