It was checking something in shared preferences which seems
to have stopped working (a bunch of the stuff used in the
test is deprecated). This CL just has it verify that
updateDarkTheme() is called when appropriate since that
is all we really care about.
Test: is a test
Bug: 130897882
Change-Id: If3286dd91b5a95cb0f41cac619a11a9089e0aecf
b0737ee174