Return view for xs when droplevel=False with regular Index
- [x] xref #37776
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`

Is there a better way to test, if the object is a view?

cc @jbrockmendel 

thanks for following up on this thanks @phofl 