Implement sharpen

bug:7279964
bug:7247494
bug:7234321

- add a sharpen filter
- add infrastructure to use RenderScript
- some refactoring (add an ImageSlave class)
- add new zoom UI

Change-Id: Id94dc94d32866c7107b6818adf4db35d0c6c0b01
15 files changed
tree: 735858ee2b951a6140fc06aa7a968ed9625851c2
  1. gallerycommon/
  2. src/
  3. src_pd/
  4. tests/