[MaterialCardView] Updated documentation with the reference of the Androidx CardView
[MaterialCardView] Updated documentation with the reference of the Androidx CardView

Resolves https://github.com/material-components/material-components-android/pull/574

GIT_ORIGIN_REV_ID=2656d3dee0f43ffa3d210711e7c468c9e4260280
PiperOrigin-RevId: 271606323

material-components/material-components-android