This converts to using newer meson build system, and makes use of gRPC
API rather using native agl-shell-desktop protocol. We still need to use
wayland for window set-up so xdg-shell is still there and supported.
Bug-AGL: SPEC-4987 Signed-off-by: Marius Vlad <marius.vlad@collabora.com>
Change-Id: I81eefe103c67b8d490fd33c14cc8f4b04feceaed