Summary:
Adds a plugin for listing the databases, tables and contents of those tables in an android app.
Right now, works with sqlite, but it should be generic enough to work with other db types.
## Changelog
Add initial version of android databases plugin
Creating a PR, I may need to do some cleaning up, but this is to kick off that process.
Pull Request resolved: https://github.com/facebook/flipper/pull/441
Reviewed By: danielbuechele
Differential Revision: D15288831
Pulled By: jknoxville
fbshipit-source-id: 6379ad60d640ea6b0a9473acc03dd6ea81a3a8d4
