Revert to using AppTheme for LayoutLib tests. [DO NOT MERGE]

Use AppTheme for all tests other than testExpand. AppTheme contains an
attribute needed by testArrayCheck. Also, since the AppTheme extends
Theme.Material.Light.DarkActionBar, other tests should be unaffected.

Also, update the golden image for the testArrayCheck.

Change-Id: Ib5f53f3b029c5aceef2b622e5ac63952d6b1972a
(cherry picked from commit 89a045c3)