Cleaner way to apply styles; make sure we know font sizes when measuring

Use TextAppearance spans to style senders, draft, message info
That way we have the sizes, font style, and colors up front

Should help with b/6910770 track any incorrect senders formatting bug

Change-Id: I4a0157e92a619c9394997fb49d5003dd8f4e1056
4 files changed