Sync for Backblaze B2

Features:
- Support for Backblaze B2, AWS S3, Wasabi, Scaleway, Storj, iDrive E2, MinIO and others,
- Zero Knowledge E2E encryption (AES),
- Background synchronization,
- Photo&video sharing,
- Remote files preview,
- Browser web client: https://web.syncaware.com,
- Upload constraints (only wifi, only charger, battery not low etc.),

No credit card required.
Free tiers available, e.g. 10GB at Backblaze, 75GB at Scaleway, 150GB at Storj.

Telegram: https://t.me/photosyncs3
Bug report: https://github.com/photosync/android-photosync-s3/issues