Design support library skeleton

Change-Id: I997af23e4aa7235f45908875c717831b50cb08b4
diff --git a/settings.gradle b/settings.gradle
index 856c8d9..7e907c2 100644
--- a/settings.gradle
+++ b/settings.gradle
@@ -27,3 +27,6 @@
 
 include ':support-leanback-v17'
 project(':support-leanback-v17').projectDir = new File(rootDir, 'v17/leanback')
+
+include ':support-design'
+project(':support-design').projectDir = new File(rootDir, 'design')