b2f366b3b795d2e43fb3b54c13554f95779f8ee4

This patch removes the need to include the Web Animations API Polyfill (web-animations-js) as a dependency. Angular will now fallback to using CSS Keyframes in the event that `element.animate` is no longer supported by the browser. In the event that an application does use `AnimationBuilder` then the web-animations-js polyfill is required to enable programmatic, position-based access to an animation. Closes #17496 PR Close #22143
Safari (7+), iOS (7+) and IE mobile (11) are tested on BrowserStack.
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TypeScript
86.3%
JavaScript
8.5%
HTML
1.8%
Starlark
1.7%
CSS
1%
Other
0.6%