setShadowCompatibilityMode

Set the shadow compatibility mode. This allows control over when fake shadows should drawn instead of native elevation shadows.

Note: To prevent clipping of fake shadow for views on API levels above lollipop, the parent view must disable clipping of children by calling setClipChildren, or by setting `android:clipChildren="false"` in xml. `clipToPadding` may also need to be false if there is any padding on the parent that could intersect the shadow.