docs: Add distribution guidelines and update quality checklist
for Android Auto.

Change-Id: Ie504fee6ee32fd24d332ff65004a6b711e7fe3ec
diff --git a/docs/html/auto/index.jd b/docs/html/auto/index.jd
index d113a7d..a0f01e6 100644
--- a/docs/html/auto/index.jd
+++ b/docs/html/auto/index.jd
@@ -3,6 +3,7 @@
 fullpage=true
 no_footer_links=true
 page.type=about
+page.image=/auto/images/hero.jpg
 
 @jd:body