Implement List component

[dfreedm]

[fernandopasik]

Is this blocked from a particular issue in https://github.com/material-components/material-components-web ?

[e111077]

Hello, it's under active development in the mwc-select branch

[fernandopasik]

Thanks @e111077 for landing this one in #763

[dfreedm]

@e111077 can this be closed?