refactor(material/slider): refactor variable type to const in slider component unit tests (#22840)
refactor(material/slider): refactor variable type to const in slider component unit tests (#22840)


DevVersion/material2,angular/components,josephperrott/material2,crisbeto/material2,josephperrott/material2,angular/components,DevVersion/material2,DevVersion/material2,mmalerba/material2,crisbeto/material2,angular/components,angular/components,mmalerba/material2,josephperrott/material2,mmalerba/material2,mmalerba/material2,josephperrott/material2,crisbeto/material2,crisbeto/material2,josephperrott/material2,DevVersion/material2,mmalerba/material2,DevVersion/material2