Support individual sequence of trim paths

[spegoraro]

Hi there, thanks for the awesome work on this repo!

It would be great if this implementation could support trim paths where multiple sources are run individually instead of the default of sequentially. This is supported in the ios and android lottie implementations (lottie 3.0 introduced it).

I'm happy to help make this but am new to the repo so if someone can point me to a good starting point I'll have a go.

[xvrh]

Hello @spegoraro, I think a good starting point would be to provide an animation with the feature you want. Then we will try to understand why it works on Lottie-android but not here.

This library is port of the android codebase, so generally we have the same features (though sometime one small thing can be forgotten).