am 33f6d634: am e4e1c3fd: am 40afb97c: cherrypick Change-Id: I51ac719e414ac2794ff446d992bb946acb0fa896 docs: add button builder for android market apps

* commit '33f6d6347b88d239b16a6b3f28adcb7bf4a61881':
  cherrypick Change-Id: I51ac719e414ac2794ff446d992bb946acb0fa896 docs: add button builder for android market apps