Update testNrStateRedacted to Build ServiceState

Reimplementing this test to build a ServiceState object
rather than expecting one to be provided by telephony.
This can ensure that the redaction code is working as
expected even on devices that do not always return a
valid service state, increasing applicability and reducing
potential flake.

Bug: 196232082
Test: atest ServiceStateTest#testNrStateRedacted
Change-Id: Ie999c2cf7edbcf07ca80c457e601d487b6a4f26f
1 file changed