am b2ac2d80: am a5e5a459: am e7df2e3f: am f6457d05: Merge "Retroactively add EffectiveNavigation and TabCompat sample code." into jb-dev

* commit 'b2ac2d803b709da4cb5925316d955dc4049a807b':
  Retroactively add EffectiveNavigation and TabCompat sample code.