Add leaderboard based on user's edits using Commons Android app

The Wikimedia Commons Android app allows users to upload pictures from their Android phone/tablet to Wikimedia Commons. Commons is not only the image repository for Wikipedia, but an independent project that seeks to document the world with photos, videos and recordings.

Github link: https://github.com/commons-app/apps-android-commons/issues/2074

Commons Android App Repo (for UI): https://github.com/commons-app/apps-android-commons/

Commons Misc Repo(for APIs): https://github.com/commons-app/commonsmisc

The project is about adding a leaderboard based on user's edits using Commons. We would like to motivate people to contribute more media and also celebrate their achievements. This feature will include only edits made with the mobile app, and users who have shown interest in this activity.