fix(select): Set aria-selected="false" properly
fix(select): Set aria-selected="false" properly

Don't remove the attribute completely.

Per https://www.w3.org/WAI/PF/aria/states_and_properties,
aria-selected should be false if unselected, not removed.

BREAKING CHANGE: adapter method removeAttributeAtIndex removed.

PiperOrigin-RevId: 312133369

material-components/material-web,material-components/material-web