Update Android OS programmatically

I am working on a Mobile Device Management Project. One of the requirements of our project is to update an Android device OS programmatically. The flow will be as follows:

1. Server sends push notification about OS update.
2. Android client downloads the updates.
3. Now I want to update An开发者_Go百科droid device OS programmatically.

How can I do this?

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There is no way to start system updates on normal non-rooted devices. System updates are delivered OTA only by Google and/or network providers.