Update OutputTest due to DisplaySettings changes

In Ifc464779ed368d2edad7fc6adab53e9b368fd7cb, operator== for
DisplaySettings was updated to include the remaining fields. Update
tests to expect proper equality.

Fixes: 231394619
Test: libcompositionengine_test
Change-Id: I4d4be852a271d08be130e2c539431eae769021e3
Merged-In: I4d4be852a271d08be130e2c539431eae769021e3