Update virglrenderer to use GLES instead of GL

... when running with --gpu_mode=drm_virgl to test out running on
chromebooks which do not have GL libs.

Bug: b/147316364
Test: m && launch_cvd
Test: m && launch_cvd --gpu_mode=drm_virgl
Change-Id: I8f470fc5c00ab9f29631997c6cceed0e78ca22f2
diff --git a/host/libs/vm_manager/crosvm_manager.cpp b/host/libs/vm_manager/crosvm_manager.cpp
index 7cc1f14..6c8912e 100644
--- a/host/libs/vm_manager/crosvm_manager.cpp
+++ b/host/libs/vm_manager/crosvm_manager.cpp
@@ -125,7 +125,7 @@
                                 "--gpu=gfxstream," : "--gpu=",
                             "width=", config_->x_res(), ",",
                             "height=", config_->y_res(), ",",
-                            "egl=true,surfaceless=true,glx=false,gles=false");
+                            "egl=true,surfaceless=true,glx=false,gles=true");
     crosvm_cmd.AddParameter("--wayland-sock=", instance.frames_socket_path());
   }
   if (!config_->final_ramdisk_path().empty()) {