move log submission to new library

### outline
- SubmitLogFragment can be included in any project to report device logs to a hastebin-compatible endpoint as specified by the activity. Activity must implement the proper interface methods to handle success/failure/cancel cases.
- Basic data scrubber to remove potentially sensitive info by default.

### todo
- maven repo and maybe separate git repo? should talk about plan for modularizing code.
- more configuration options as needed, good for now i think.
- work out how translations will work with subprojects

gradle-witness is great, we have to use it ;)