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

* commit 'e4e1c3fda937d30c9aa75a43c470de6c54a97073':
  cherrypick Change-Id: I51ac719e414ac2794ff446d992bb946acb0fa896 docs: add button builder for android market apps