Remove STOPSHIP code from CarrierTextControllerTest

This code was added when the path to obtain the Subscription List was
changed to droidfood Telephony code. With the new behavior controlled by
the variable
CarrierTextController#mDisplayOpportunisticSubscriptionCarrierText we
don't need the extra code.

This change makes the tests more constrained

Test: this test
Fixes: 131433453
Change-Id: Iae911858f3271509e47de295773fe8d46ea195a8