Fix 2087 round gif

[hetovar]

Motivation

Making rounding GIF would make the application more appealing to users as well as adding some more functionality.

Test Plan

Added some test in order to show that the drawable is able to be drawn with either the property or without it.

[oprisnik]

Thanks for looking into this. Same comments as for #2145

I think this should be approached by adding postprocessor support for animation frames and utilizing our existing (and way more performant) rounding postprocessor: https://github.com/facebook/fresco/blob/master/imagepipeline/src/main/java/com/facebook/imagepipeline/postprocessors/RoundAsCirclePostprocessor.java

Basically, you would set the rounding postprocessor for the animated image, which would then be applied in the backend.

You also need to account for this when the frame is cached since the frame cache can be shared across multiple GIFs, so the cache key must include the postprocessor cache key if there is one or otherwise we should only cache the original frame (or cache nothing).

@woyunowuyuda and @hetovar you basically worked on the same thing here, (GIF and animated WebP use the same infra), so you should coordinate.

[erikandre]

Closing this as we are not able to accept the contribution as-is and no updates has been made since July.