Add unit tests for DirectoryFragment.Model.

Refactor DirectoryFragment.Model to be a static class.
Introduce some unit tests.

BUG=23754695

Change-Id: Iaa064292ab26b23ac7247e49c05ba91033d84a18
2 files changed
tree: 78383b5a33b131176cc8463e90ba412f5d4bf27f
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. wrap_alpha.py