Sticker Backup: Can we add a feature to backup stickers along with chats. Currently we can backup chats.

[ankit-gautam23]

Specifications
OS Version: [FILL IN] Device Manufacturer: [FILL IN]

Stickers

• [ ] My stickers do comply with the sticker requirements (512x512 and < 100 KB)
• [ ] My tray icon does comply with the requirements (96x96 and < 50 KB)
• [ ] I am using WebP images for stickers.
• [ ] I am using PNG images for stickers.

Problem Description
[FILL IN WITH DETAILED DESCRIPTION OF THE PROBLEM]

Reproduction Steps
[FILL IN WITH DETAILED REPRODUCTION STEPS]

Head of Commit [Do you have the latest commit from master? If not, please update your repo to the latest commit in master, and try again. If issue still occurs, please note down the commit hash (from this repo) here:] [Commit hash]

Links
[FILL IN PLAY STORE LINK AND/OR LINK TO SOURCE CODE ON GIT]