Soong support for namespaces

Bug: 65683273
Test: build/soong/scripts/diff_build_graphs.sh \
      --products=aosp_arm \
      'build/blueprint:work^ build/soong:work^' \
      'build/blueprint:work build/soong:work'
      # and see that the only changes were:
      # 1. adding some new files
      # 2. changing some line numbers
Test: m -j nothing # which runs unit tests

Change-Id: I6d3e52ef62c4cabe85b9a135a54de0e1a6aab29c

android/androidmk.go

@@ -159,6 +159,12 @@ func translateAndroidMkModule(ctx SingletonContext, w io.Writer, mod blueprint.M
 		return nil
 	}
 
+	if !amod.commonProperties.NamespaceExportedToMake {
+		// TODO(jeffrygaston) do we want to validate that there are no modules being
+		// exported to Kati that depend on this module?
+		return nil
+	}
+
 	data := provider.AndroidMk()
 
 	if data.Include == "" {