Commons Android app: Make upload more reliable

Wikimedia Commons is an Android app that enables users to upload and view pictures from their Android phone/tablet on the Commons server. This project aims to fix uploads related issues and deal with location metadata loss. I plan to solve each issue by following various hints provided by the mentors and figuring out the potential points of failure in each of them. Deliverables: Report/Blog on findings, fix bugs, write/modify corresponding unit tests Issue #5196: Picture location is sometimes lost despite being present in EXIF Possible Implementation Strategy: Based on the hints provided, a number of scenarios can be analysed and the location loss may be fixed depending on the case. Issue #5128: Upload often fails, especially when uploading 5 or more pictures over a slow Internet connection. Possible Implementation Strategy: As described in the issue, the network parameters need to be experimented upon, and a retry loop may be incorporated. Issue #5136 (if time allows): Retried uploads stuck in queued state Possible Implementation Strategy: As observed by some users, the uploading process gets resumed when a new upload is performed. This means that the STATE_QUEUED needs to be updated appropriately to the same state as that of a new upload once the internet connectivity resumes/the paused uploads are started again.