(a12) default wayland/x11 to h264

Since we don't have more detailed info about the type to communicate,
assume the contents to be lively and pick lossy over lossless.

src/a12/net/net.c

@@ -283,6 +283,8 @@ static struct a12_vframe_opts vcodec_tuning(
  * we can deal with passthrough and then device_fail that if the other end
  * starts to reject the bitstream */
 	case SEGID_MEDIA:
+	case SEGID_BRIDGE_WAYLAND:
+	case SEGID_BRIDGE_X11:
 		opts.method = VFRAME_METHOD_H264;
 		opts.bias = VFRAME_BIAS_QUALITY;
 	break;