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. .gitignore
  2. AUTHORS
  3. CONTRIBUTING.md
  4. CONTRIBUTORS
  5. LICENSE
  6. PATENTS
  7. README
  8. app/