UI fixes to align locked provider chip with mocks, handle empty credential type display names, and handle empty credential lists

TODO(b/337078208): need to start-align multi credentials screen text that is not in chips

Bug: b/322647040
Test: Manual, went through UX review, not too different from go/credential-selector-ui
Change-Id: I5347284f0b2fcd4f0cc268d4882cd5fcb8aa3681
6 files changed