Adding projec.yaml files to all top/sub categories.

Change-Id: I8ac3a958852071da46fa08178ca3a74b103e48df
diff --git a/docs/html/_project.yaml b/docs/html/_project.yaml
new file mode 100644
index 0000000..a67469b
--- /dev/null
+++ b/docs/html/_project.yaml
@@ -0,0 +1,5 @@
+name: "Home"
+home_url: /
+description: "Android Developers website."
+content_license: cc3-apache2
+buganizer_id: 30209417