Remove ***** shown in get-flow password's credential card

We use to render a password credential with its username and then
obfuscatioin, i.e. ******.

Now we will render a password credential just like how we render other
types of credentials, displaying its username, display name (if any),
credential type, provider name.

Bug: 326493266
Test: screenshots in bug
Change-Id: Ib2040815eb1d1c35711bfc8e3769088ae0d96c73