hwcomposer: keep secure content in an overlay when below skip layer

Secure content can not be displayed unless in an overlay.  Since
getLayerStats marks all layers under the skip layer for framebuffer
composition, when there is a skip layer on top of protected content,
the protected content disappears since surfaceflinger doesn't draw
protected layers.

Acked-by: Amara Venkata Mastan Manoj Kumar <manojavm@codeaurora.org>
Change-Id: I59dd5dffad08dbf578baa459f5f4c726b6674c83
2 files changed