[Ozone] Enables overlay render format setting path and by default use UYVY

ui/ozone/platform/drm/gpu/gbm_buffer.cc

Index: ui/ozone/platform/drm/gpu/gbm_buffer.cc
diff --git a/ui/ozone/platform/drm/gpu/gbm_buffer.cc b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
index 117a52f7c1bb145828cc6132d9dcb074c35962ce..8d8dc24418977b666d09bef6f947f0a355caad7e 100644
--- a/ui/ozone/platform/drm/gpu/gbm_buffer.cc
+++ b/ui/ozone/platform/drm/gpu/gbm_buffer.cc
@@ -113,6 +113,10 @@ int GbmPixmap::GetDmaBufPitch() {
   return gbm_bo_get_stride(buffer_->bo());
 }
 
+gfx::BufferFormat GbmPixmap::GetPixelFormat() {
+  return GetBufferFormatFromFourCCFormat(buffer_->GetFramebufferPixelFormat());
+}
+
 bool GbmPixmap::ScheduleOverlayPlane(gfx::AcceleratedWidget widget,
                                      int plane_z_order,
                                      gfx::OverlayTransform plane_transform,