drm_hwcomposer: Add MediaTek platform support
This platform handler is dedicated for the i500 MediaTek SoC [1]. i500 has a Mali-G72 MP3 GPU.
OpenGL/Mali integration is based on ARM Gralloc module, version BX304L01B-SW-99005-r20p0-01rel0, without additional patches.
This platformmediatek is based on platformmeson, without the additional usage flag in the private_handle_t. AFBC support has also been removed as it's unsupported.
External Android.bp file should be created in order to build this module:
cc_library_shared {
name: "hwcomposer.drm_mediatek",
defaults: ["hwcomposer.drm_defaults"],
srcs: [":drm_hwcomposer_platformmediatek"],
whole_static_libs: ["drm_hwcomposer"],
}