am 9e36f588: Merge "update storage doc for secondary external storage in KK and add some new sample code and remove documentation for APIs below level 8 and add information about permission changes in KK bug: 11907502" into klp-docs

* commit '9e36f588993e02210f02d9b7c0600a842d67bbdb':
  update storage doc for secondary external storage in KK and add some new sample code and remove documentation for APIs below level 8 and add information about permission changes in KK bug: 11907502