am 99f4fe07: Merge "Refactor directory API to "opening document tree."" into lmp-preview-dev

* commit '99f4fe0797adb8350f92c7d1ba11776d1947e768':
  Refactor directory API to "opening document tree."
tree: 98665abfe77739a3f70c7c7b016acf099990d05a
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml