Intent to ship: endpoint-inclusive commitStyles

[Kanaru Sato]

Hi,

I intend to turn endpoint-inclusive commitStyles on by default as of Firefox 142.

(i.e. `Animation.commitStyles` uses the final value of the animation interval even if a corresponding fill mode is not set.)

Pref: dom.animations.commit-styles-endpoint-inclusive
Bug to turn on by default: https://bugzilla.mozilla.org/show_bug.cgi?id=1973203

Spec: https://drafts.csswg.org/web-animations-1/#endpoint-inclusive-active-interval

Status in other browsers:

- Blink: not yet

- WebKit: not yet

Thanks,
canalun