distorted Floating action button shadow

[NarendraDodiya]

OS : 6.0
Steps to reproduce:

1. Launch app
2. tap on Floating action button to play animation
3. Observe Floating action button shadow

[danielzeller]

Guessing this is related to hardware layer on the Floating button.. Try setting it to layerType.NONE

[danielzeller]

I changed the example to use an ImageButton instead of a Fab. I think the regular shadow of the fab interfers with the Custom shadow in the DepthLayout.