[x] Has CHANGELOG.md been updated?
[x] Are tests passing locally?
[x] Are the files formatted correctly?
[x] Did you add unit tests?
[x] Did you test your change with either the sample apps that are included in the repository or with a blank app that uses your change?

Description

Move installation to background to avoid ANRs. Restored ReleaseDonwloader abstraction from DownloadManager.

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