Cancelling file(Or stop downloading option)

## 🚀 Feature Requests

### Describe the feature
Like if i am storing video file in cache and in between i want to cancel the ongoing download.

I tried doing this with remove method but in background downloading was still going no matter what i do ,file gets downloaded fully in background..

If there is solution available already then pls tell me how to do!!!!
### Platforms affected (mark all that apply)
- [x] :iphone: iOS
- [x] :robot: Android

Review the cache manager's download API and the current remove behavior on the iOS and Android paths. Determine how an in-progress download could be cancelled, then verify that cancellation stops the background transfer while preserving the intended cache behavior.

索引モデルが issue の本文から書いたものです。