message: pass through filter: make it public visible
diff: @@ -12,10 +12,7 @@ envoy_cc_library(
  name = "pass_through_filter_lib",
  hdrs = ["pass_through_filter.h"],
  # A thin shim used by test and prod filters.
  - visibility = [
  - "//source:__subpackages__",
  - "//test:__subpackages__",
  - ],
  + visibility = ["//visibility:public"],
  deps = [
  "//include/envoy/server:filter_config_interface",
  ],
  