title: Theme attributes in pre-lollipop Drawable using DrawableCompat?
body: <p>I've successfully used theme attributes (ex. <code>?attr/colorPrimary</code>) within a <code>VectorDrawable</code> loaded through <code>VectorDrawableCompat</code>.  Is there a way to do the same with a simple <code>Drawable</code> containing a shape via <code>DrawableCompat</code>?</p>