After changing my app's icon, the icon in the "recent apps tray" remains Android's default. I want to change it but cannot find any way to do so. Every single app I've ever used got it's own icon there (although noticed some of them left there their old icon) so I don't want to be any different.

The "recent apps tray" looks like the following example:

[recent apps tray example](https://i.stack.imgur.com/ufink.jpg)

Thanks in advance.