Add frameworks/av to root.bp

Change-Id: Id1867ba1be12b4ddee0e5d9a23e6bbd2c2699b7f
diff --git a/root.bp b/root.bp
index c4f2d57..c42dd58 100644
--- a/root.bp
+++ b/root.bp
@@ -12,6 +12,7 @@
     "build/tools/*",
     "dalvik",
     "external/*",
+    "frameworks/av",
     "frameworks/base",
     "frameworks/native",
     "hardware/*",