am 7350ff3d: Merge change 24631 into donut

Merge commit '7350ff3d572624abb5a46c3c4969e0b91cb05109' into eclair

* commit '7350ff3d572624abb5a46c3c4969e0b91cb05109':
  Minor changes to api levels doc and upgrading doc. Change Linux "tested on" to Hardy Heron.