media: add basic MediaRenderer mojom and TypeConverters

mojo/services/public/interfaces/media/BUILD.gn

Index: mojo/services/public/interfaces/media/BUILD.gn
diff --git a/mojo/public/interfaces/application/BUILD.gn b/mojo/services/public/interfaces/media/BUILD.gn
similarity index 64%
copy from mojo/public/interfaces/application/BUILD.gn
copy to mojo/services/public/interfaces/media/BUILD.gn
index 41a9175b0f79e944834291c5eb41fcb68c7380e3..bef6f88cc47ec774b14b9a7578a6a9eaee97bd51 100644
--- a/mojo/public/interfaces/application/BUILD.gn
+++ b/mojo/services/public/interfaces/media/BUILD.gn
@@ -4,10 +4,10 @@
 
 import("//mojo/public/tools/bindings/mojom.gni")
 
-mojom("application") {
+# GYP version: mojo/mojo_services.gypi:mojo_media_bindings
+mojom("media") {
   sources = [
-    "application.mojom",
-    "service_provider.mojom",
-    "shell.mojom",
+    "media_types.mojom",
+    "media_renderer.mojom",
   ]
 }