[Buttons] Add safeguard to avoid overwriting centerVisibleArea with the same value.
[Buttons] Add safeguard to avoid overwriting centerVisibleArea with the same value.

PiperOrigin-RevId: 320256945

material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios,material-components/material-components-ios