Can we have an embedder with VC4 drivers

[shrkamat]

Feature request
As I understand the current embedded is based on Broadcom API's. Can we have a sample embedder that uses VC4 driver on raspberry pi, https://dri.freedesktop.org/docs/drm/gpu/vc4.html

Link fliutter with libGL.so & libGLESv2.so in place of libbrcmGL.so & libbrcmGLESv2.so.