Add rudimentary keyboard operation support.

Currently only select-all/copy/paste of files is supported.
Note, I wasn't able to push all code into DirectoryFragment,
as Jeff Sharkey suggested, as it doesn't have direct access
to KeyEvents. Bridged this from StandaloneActivity.

Change-Id: I082c457c9c4372e689d3acbca9ae11cd5c554a63
3 files changed
tree: 0436f871adf98e5d48da6baf67435087402ba905
  1. res/
  2. src/
  3. tests/
  4. Android.mk
  5. AndroidManifest.xml
  6. wrap_alpha.py