[modular][config] Add modular_config_schema to sdk

MF-360 #comment Add modular_config_schema to SDK via SDK add-on

Change-Id: I0d8d2f55c776bc9e39021b6e4854b177a817e0a7
diff --git a/public/sdk/BUILD.gn b/public/sdk/BUILD.gn
index b7cb672..1baba2b 100644
--- a/public/sdk/BUILD.gn
+++ b/public/sdk/BUILD.gn
@@ -22,6 +22,7 @@
   api = "fuchsia_dart.api"
 
   deps = [
+    "//sdk/docs:modular_config_schema",
     "//topaz/bin/fidlgen_dart:fidlgen_dart_sdk($host_toolchain)",
     "//topaz/public/dart/composition_delegate:composition_delegate_sdk($dart_toolchain)",
     "//topaz/public/dart/fidl:fidl_sdk($dart_toolchain)",
diff --git a/public/sdk/fuchsia_dart.api b/public/sdk/fuchsia_dart.api
index 539b956..aaa42c3 100644
--- a/public/sdk/fuchsia_dart.api
+++ b/public/sdk/fuchsia_dart.api
@@ -10,6 +10,7 @@
 sdk://dart/fuchsia_vfs
 sdk://dart/zircon
 sdk://docs/metadata_schemas
+sdk://docs/modular_config_schema
 sdk://fidl/fuchsia.auth
 sdk://fidl/fuchsia.images
 sdk://fidl/fuchsia.intl