mdc-text-fields vertical alignment is incorrect

[lynnmercier]

Spec shows 20px from top of box to baseline of label, and then 20px from baseline of label to baseline of text:
https://material.io/design/components/text-fields.html#spec

But our component shows ~19px from top of box to baseline of label, and then 24px from baseline of label to baseline of text

(I actually think the spec might be wrong. It seems a bit tight on the spacing)

[kfranqueiro]

We should probably also check that Textarea's distance between baselines are consistent with Text Field's.

[kfranqueiro]

Confirmed with design that the space between baselines should be 20px. Right now our spacing below the input text is 4px less than it should be. Bringing it up should also make it consistent with outlined text field.