Fix delegated cert installer test

For the managed profile use case, set a profile owner
on the primary user instead of a plain device admin.
Device admins are not able to reset passwords from N.
For device owner or profile owner on meat user tests,
that existing owner will set/clear the password instead

Bug: 25906854
Change-Id: Ib5f448379b30373d499e317569d2a27f37f487c3
7 files changed