Feature: Generate Notification icons for Android

[ath0mas]

Hello here, I recently started to work on a feature branch to add Android Notification icons generation.

It mostly consists of a smallIcon, white and transparent, in 5 sizes, and an ~~optional largeIcon in 1 size and no restriction on colors~~. See example refs about it: 1, 2.

As a first step, I implemented and tested it the same way adaptive icons are added to the main generate exec, with new path and boolean options.

• What do you think about it?

Unlike app icons, and aside making it work with a default notification source icon (like notification.png), it would be useful to be able to generate various other ones.

• To do so, should it be the existing generate that be changed to be able to not generate any app icon, but only more notification icons, given appropriate options?
• or, should we go for a new entrypoint to generate only notification icons?

[ath0mas]

Please @dwmkerr is that ok for you or any orientation to give me? I would like to create a PR for it around next week.