ArrayTestListAdapter Class

I wanted to do what StreamingVideoActivity was doing with
TestListAdapter where it customized what rows were being
returned by overriding getRows.

So I moved code in TestListAdapter that scanned the
AndroidManifest to its own class called ManifestTestListAdapter.

I then extracted ArrayTestListAdapter from StreamingVideoActivity,
so you can call add(TestListItem) to build up a list of tests.

Change-Id: If3d2bacc52e19f326467a36ab55aa52c49f765cc