android: implement file uploads

- Files can now be uploaded from any other application that exposes
  them, including Google Drive.

Tested manually uploading images from the phone and from GDrive.

Change-Id: Ib81e06a8eb2278289ad08cfe48364c51c3ab5d9c
2 files changed
tree: 75d312d7ee2b0628f5d774ff0da541c882756d63
  1. app/
  2. .gitignore
  3. AUTHORS
  4. CONTRIBUTING.md
  5. CONTRIBUTORS
  6. LICENSE
  7. PATENTS
  8. README