Revert "Skip static animations on compositor and main"

This reverts commit 3690cd78.

Reason for revert: virtual/threaded-no-composited-antialiasing/animations 
tests started failing on multiple builders after this CL.
* https://ci.chromium.org/ui/p/chromium/builders/ci/linux-bfcache-rel
* https://ci.chromium.org/ui/p/chromium/builders/ci/mac11-arm64-rel-tests
* https://ci.chromium.org/ui/p/chromium/builders/ci/mac12-arm64-rel-tests
* https://ci.chromium.org/ui/p/chromium/builders/ci/Linux%20Tests

Original change's description:
> Skip static animations on compositor and main
>
> An animation with empty keyframes or with keyframes whose property
> values are identical between frames previously ran as a normal
> animation. As there is no visual change other than at a phase boundary,
> these animations do not need to run on the compositor, and only need
> to be scheduled on the main thread at phase boundaries.
>
> This is the first step in optimizing no-op animations. A follow up
> patch will short-circuit sampling when the property value is constant.
> Another patch will refine the rules for background color compositing
> to only consider dynamic properties.  Finally, metrics will be added
> to track shorthand expansion of CSS properties, which is likely the
> most common source of static properties in CSS animations.
>
> Bug: 40728212
> Change-Id: I1baff2d0d26400f91f12d4cac2141e9bb101b3d0
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5328026


> Reviewed-by: Ian Clelland <iclelland@chromium.org>
> Reviewed-by: Robert Flack <flackr@chromium.org>
> Commit-Queue: Kevin Ellis <kevers@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#1268998}

Bug: 40728212
Change-Id: Idccfa689d7a3b6e6ee9e2b6a5d109c94a4d3870b
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5349489
Owners-Override: Michael Ershov <miersh@google.com>
Commit-Queue: Michael Ershov <miersh@google.com>
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Auto-Submit: Michael Ershov <miersh@google.com>
Cr-Commit-Position: refs/heads/main@{#1269503}