[libcomponent]: Narrow down visibility.

DX-387 #comment

TEST=CQ

Change-Id: I36ad246c5a8ec9e59000419492b4e05e154c874f

garnet/public/lib/component/cpp/BUILD.gn

@@ -36,18 +36,102 @@ source_set("cpp") {
   #
   # DO NOT ADD MORE ENTRIES TO THIS LIST.
   visibility = [
-    "//garnet/bin/*",
-    "//garnet/drivers/*",
-    "//garnet/examples/*",
-    "//garnet/lib/*",
-    "//garnet/public/lib/*",
-    "//garnet/tests/e2e_input_tests:*",
-    "//peridot/*",
-    "//src/connectivity/overnet/*",
+    ":environment_services",
+    "testing/*",
+    "//garnet/bin/appmgr/integration_tests/inspect:*",
+    "//garnet/bin/guest/*",
+    "//garnet/drivers/virtual_camera:*",
+    "//garnet/bin/inspect_unittests/*",
+    "//garnet/bin/instrumentation_benchmarks/*",
+    "//garnet/bin/iquery/*",
+    "//garnet/bin/netemul_runner/*",
+    "//garnet/bin/ktrace_provider/*",
+    "//garnet/bin/logger/tests/cpp/*",
+    "//garnet/bin/mdns/service/*",
+    "//garnet/bin/mdns/util/*",
+    "//garnet/bin/media/*",
+    "//garnet/bin/memory_monitor/*",
+    "//garnet/bin/netconnector/*",
+    "//garnet/bin/network_time_service/*",
+    "//garnet/bin/scpi/*",
+    "//garnet/bin/sysmem-assistant/*",
+    "//garnet/bin/sysmem_connector/*",
+    "//garnet/bin/sysmgr/*",
+    "//garnet/bin/system_monitor/harvester/*",
+    "//garnet/bin/trace/*",
+    "//garnet/bin/trace/tests/*",
+    "//garnet/bin/trace_manager/*",
+    "//garnet/bin/tz-util/*",
+    "//garnet/bin/ui/*",
+    "//garnet/bin/ui/tests/performance/vulkan_is_supported/*",
+    "//garnet/bin/ui/view_manager/*",
+    "//garnet/bin/vulkan_loader/*",
+    "//garnet/bin/zircon_benchmarks/*",
+    "//garnet/drivers/usb_video/*",
+    "//garnet/drivers/video/amlogic-decoder/*",
+    "//garnet/examples/escher/common/*",
+    "//garnet/examples/media/use_media_decoder/*",
+    "//garnet/examples/media/use_media_decoder/*",
+    "//garnet/examples/media/use_media_decoder/*",
+    "//garnet/examples/media/use_media_decoder/*",
+    "//garnet/examples/ui/bouncing_ball/*",
+    "//garnet/examples/ui/embedder/*",
+    "//garnet/examples/ui/embedder/*",
+    "//garnet/examples/ui/lab/direct_input/*",
+    "//garnet/examples/ui/lab/direct_input/child/*",
+    "//garnet/examples/ui/lab/pose_buffer/*",
+    "//garnet/examples/ui/lab/pose_buffer_provider/*",
+    "//garnet/examples/ui/lab/scenic_dev_app/*",
+    "//garnet/examples/ui/lab/stereo_app/*",
+    "//garnet/examples/ui/shadertoy/client/*",
+    "//garnet/examples/ui/shadertoy/service/*",
+    "//garnet/examples/ui/sketchy/*",
+    "//garnet/examples/ui/standalone_app/*",
+    "//garnet/examples/ui/video_display/*",
+    "//garnet/examples/ui/yuv_to_image_pipe/*",
+    "//garnet/lib/media/camera/simple_camera_lib/*",
+    "//garnet/lib/media/camera/simple_camera_server/*",
+    "//garnet/lib/media/test/*",
+    "//garnet/lib/media/test/*",
+    "//garnet/lib/profiler/*",
+    "//garnet/lib/ui/gfx/*",
+    "//garnet/lib/ui/gfx/tests/*",
+    "//garnet/lib/ui/scenic/*",
+    "//garnet/lib/ui/scenic/tests/*",
+    "//garnet/lib/vulkan/tests/vkcube/*",
+    "//garnet/public/lib/cobalt/cpp/*",
+    "//garnet/public/lib/guest/*",
+    "//garnet/public/lib/inspect/*",
+    "//garnet/public/lib/netconnector/cpp/*",
+    "//garnet/public/lib/test_runner/cpp/*",
+    "//garnet/public/lib/ui/base_view/cpp/*",
+    "//garnet/public/lib/ui/sketchy/client/*",
+    "//garnet/public/lib/ui/tests/mocks/*",
+    "//garnet/public/lib/ui/view_framework/*",
+    "//garnet/tests/e2e_input_tests/*",
+    "//peridot/bin/basemgr/*",
+    "//peridot/bin/basemgr/cobalt/*",
+    "//peridot/bin/context_engine/*",
+    "//peridot/bin/module_resolver/*",
+    "//peridot/bin/sessionmgr/*",
+    "//peridot/bin/suggestion_engine/*",
+    "//peridot/examples/simple/*",
+    "//peridot/examples/todo_cpp/*",
+    "//peridot/lib/bound_set/*",
+    "//peridot/lib/fidl/*",
+    "//peridot/lib/module_manifest/*",
+    "//peridot/lib/module_manifest_source/*",
+    "//peridot/lib/testing/*",
+    "//peridot/public/lib/app_driver/cpp/*",
+    "//peridot/public/lib/integration_testing/cpp/*",
+    "//peridot/tests/maxwell_integration/*",
+    "//peridot/tests/sessionctl/*",
+    "//src/connectivity/overnet/overnetstack/*",
     "//src/ledger/*",
 
     # TODO(SCN-1329): move playback to lib/sys.
     "//src/media/playback/*",
+
     "//third_party/dart/runtime/*",
     "//topaz/app/term:*",
     "//topaz/auth_providers/google:*",