am 8709fb2a: Merge "update Getting Started class about fragments to remove support lib lesson and mention the action bar library, then update any links and add redirect bug: 10000221" into jb-mr2-docs

* commit '8709fb2a7175faa3b53cec7869f4b7594371b882':
  update Getting Started class about fragments to remove support lib lesson and mention the action bar library, then update any links and add redirect bug: 10000221