[Testing] To migration DefaultSubscriptionControllerTest

1. Use AndroidJunit4 instead of RobolectricTestRunner
2. Use ApplicationProvider instead of RuntimeEnvironment to get context
3. Change Copy Right
4. Create new class and add a function which loads the Settings Resource.
5. remove getOnPreferenceChangeListener. Becasue the error:
java.lang.NoSuchMethodError: No virtual method getOnPreferenceChangeListener()

Bug: 173004787
Test: atest -c DefaultSubscriptionControllerTest
Change-Id: Iac9834f2a47bd8b50234646197a31058ffacaa4b