[text-field]: Should toggle `mdc-text-field--label-floating`

[trimox]

Missing class modifier found by @asyncLiz here

Sync with earlier upstream change, https://github.com/material-components/material-components-web/pull/5727

[trimox]

Hey @asyncLiz Investigating earlier comment for missing --label-floating. I do see mdc-text-field--label-floating toggled using Chrome at least. Any further insight?

Sample no focus:

Sample with focus:

Chrome styles tab with focused styles,

[asyncLiz]

My bad! Working with too many partner teams, I forgot that Angular uses the foundation, which will toggle the class for you. You shouldn't need it in your template unless you had to worry about server-side rendering.

[trimox]

@asyncLiz No worries!