[MaterialRadioButton] App centerIfNoTextEnabled like checkboxes

[nicbell]

Is your feature request related to a problem? Please describe.

By default MaterialCheckBox will center if there is no content using the centerIfNoTextEnabled property. Oddly this was never added for MaterialRadioButton

<com.google.android.material.radiobutton.MaterialRadioButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

<com.google.android.material.checkbox.MaterialCheckBox
    android:layout_width="wrap_content"
    android:layout_height="wrap_content" />

Describe the solution you'd like A clear and concise description of what you want to happen.

Describe alternatives you've considered A clear and concise description of any alternative solutions or features you've considered.

Additional context Add any other context or screenshots about the feature request here.

We also happily accept pull requests.

[nicbell]

Copying the onDraw method from checkbox fixes it.

class MaterialRadioButton2@JvmOverloads constructor(
    context: Context,
    attrs: AttributeSet? = null,
    defStyleAttr: Int = 0
) : MaterialRadioButton(context, attrs, defStyleAttr) {

    override fun onDraw(canvas: Canvas) {
        // Horizontally center the button drawable and ripple when there's no text.
        if (TextUtils.isEmpty(text)) {
            val drawable: Drawable? = CompoundButtonCompat.getButtonDrawable(this)
            if (drawable != null) {
                val dx = (width - drawable.intrinsicWidth) / 2
                val saveCount: Int = canvas.save()
                canvas.translate(dx.toFloat(), 0f)
                super.onDraw(canvas)
                canvas.restoreToCount(saveCount)
                if (background != null) {
                    val bounds: Rect = drawable.bounds
                    DrawableCompat.setHotspotBounds(
                        background, bounds.left + dx, bounds.top, bounds.right + dx, bounds.bottom
                    )
                }
                return
            }
        }
        super.onDraw(canvas)
    }
}