Support for passing default style by theme attribute

[v-mas]

Please add support for using theme attribute to pass default style.

It could be done in Shimmer builder by accepting third parameter

   AlphaHighlightBuilder().consumeAttributes(context, null, R.attr.shimmerStyle).build()

Or for extending Layout class, like

    class MyLayout constructor(context: Context, attrs: AttributeSet? = null, defStyleAttr: Int = R.attr.shimmerStyle) : ShimmerFrameLayout(context, attrs, defStyleAttr)