Allow bold and italic text

Added mmv.HtmlUtils.htmlToTextWithTags()
  which is similar to htmlToTextWithLinks()
  but allows <b> and <i>
Added test for mmv.HtmlUtils.htmlToTextWithTags()
Most text fields now use htmlToTextWithTags()
  except Permission field which is not supposed to
  have HTML

Bug: T69887
Change-Id: I16833f218e2f64586aa13925356fa2b8b7ec3100