am d23a8692: am 14e40f04: am fd117ff2: Doc change: zh-cn translation of Android L overviews. cherrypick from  I56d1ce58e10b83d10d0077cc9dfbeb04f090b861

* commit 'd23a8692ac96b7da73949d2dc4c549e73931609c':
  Doc change: zh-cn translation of Android L overviews. cherrypick from  I56d1ce58e10b83d10d0077cc9dfbeb04f090b861