[CompositeClipPathAnimation] Enable for case when clip-path: none

This change alters composited clip path animation so that the clip
bounding area is 'infinite', allowing a clip path of none to be
represented. To cover the none case, the clip path paint worklet
input is internally converted to use std::optional values.

Additionally, calculating the composited paint status is now done
earlier during pre-paint to ensure the paint properties are
properly populated when there is a composited clip path animation,
as sometimes this is not done when the initial value is none.

Change-Id: I0d9f63017bb9346d5d5bbbb550f885694a204f36
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5905279
Reviewed-by: Philip Rogers <pdr@chromium.org>
Commit-Queue: Claire Chambers <clchambers@microsoft.com>
Reviewed-by: Kevin Ellis <kevers@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1370128}