Update drawer table style mixin so the styles only target elements with a label attribute that are inside a material-list element.
Update drawer table style mixin so the styles only target elements with a label attribute that are inside a material-list element.

The label attribute is used in many different components. This allows you to place other components that use the label attribute in a material-drawer without being styled by these rules.

PiperOrigin-RevId: 175303329

angulardart/angular_components,angulardart/angular_components,angulardart/angular_components