[Mainline] To use @SystemApi to replace non-formal APIs for mainline

    - getResourcesForSubId(Context, int, boolean)
      - @SystemApi getResourcesForSubId(Context, int)
    - isUsableSubIdValue(int subId)
      - public isUsableSubscriptionId(int subId)

Bug: 147206736
Test: make RunSettingsRoboTests ROBOTEST_FILTER=ResetNetworkTest
      make RunSettingsRoboTests ROBOTEST_FILTER=ResetNetworkConfirmTest
      make RunSettingsRoboTests ROBOTEST_FILTER=CellularFallbackPreferenceControllerTest
      make RunSettingsRoboTests ROBOTEST_FILTER=WifiCallingSettingsForSubTest

Change-Id: I1a67db80b114a438afda7d45af90e54af38703c3