Update comparison of new slot status with last status.
The old comparison was based on contains() which can be incorrect
if the new state of a slot is same as the existing state of one
of the other slots. contains() returns true in that case even
though the overall slot status has changed.
Test: atest UiccControllerTest
(cherry picked from commit eb28a7169af0dcab4d4b19d6e22a6f9581a0befe)
3 files changed