Revert "Add Digital Pen hovering cursor support"

This reverts commit 452395a7b0be15409f8f24631fc55baec3bf97e5.

Change-Id: I56044073a2be926355e6ffe273ad5c014e628d52
sf: Make sure HWC_BLENDING_NONE is set for opaque layer

Before configuring the layers to HWC, make sure
HWC_BLENDING_NONE is set if the layer is opaque.

Change-Id: Ie84aa9d93e98a244692a0cffc2de653a9079f8b4