Added a sanity-check test for focus-order of well-behaved layouts

We don't want to test fine-grained details since they should
remain available for tweaking; however, we can sanity check arguments
and test for obvious cases (ie. a grid where some views are
slightly shorter than others should still sort in "reading order").

Bug: 34854951
Test: view.FocusFinderTest#testBasicFocusOrder

Change-Id: I9fc57ace861164066a491113e123031557888eb4
1 file changed