Truncates ambox template styles to only show 2 lines of text.
"Learn more" link is placed on the same line as message text
and a fade is applied so that it doesn't overlap with the message text.
On table & larger layouts, the "learn more" link is placed on its
own line below the page-issue text.
Bug: T197931
Change-Id: Id607dea537c212298c02a0e1639aef2a786eb424