Enable EGL_PLATFORM_GBM_KHR platform with device selection FunctionsEGL.cpp: - Allow EGL_PLATFORM_GBM_KHR platform and explicit device selection. - Skip getPreferredDisplay if an explicit device is specified. Display.cpp: - Use DisplayEGL impl with EGL_PLATFORM_GBM_KHR. - Wayland can use GBM platform, and OPENGLES. angle.gni: - Rename ozone_platform_gbm to ozone_platform_drm since its deprecated. Bug: angleproject:425569857, b/396434686 Change-Id: I9493118f9dc95f78ebe46277bb4fcfeb7a29d465 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6663699 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Kramer Ge <fangzhoug@chromium.org>