Move example extensions to test folder.

Fixes: 34969978
Test: hal registers itself and works.

Change-Id: I9e4795b1acbabceed017c469b89baea7e529308a
diff --git a/tests/Android.bp b/tests/Android.bp
index 337e4f4..040a6fb 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -4,6 +4,7 @@
     "bar/1.0/default",
     "baz/1.0",
     "expression/1.0",
+    "extension/light/2.0",
     "foo/1.0",
     "foo/1.0/default",
     "foo/1.0/default/lib",