[Testing] Use AndroidJUnit4 instead in telephony/cdma/ test files

1. Use AndroidJunit4 instead of RobolectricTestRunner
2. Use ApplicationProvider instead of RuntimeEnvironment to get context
3. Change Copy Right
4. To get the original value and add @After to restore the data

Bug:
Test: atest -c CdmaListPreferenceTest
      atest -c CdmaSubscriptionPreferenceControllerTest
      atest -c CdmaSystemSelectPreferenceControllerTest
Change-Id: I110727b643a6755ee888708bd1fb2a39cf524a2d