[CTS] callback result should be NO_OPPORTUNISTIC_SUB_AVAILABLE on R.

1. Empty available network will disable a profile, so in b/158020761 case, getActiveOpportunisticSubId() will be
INVALID_SUBSCRIPTION_ID.
2. The callback should be UPDATE_AVAILABLE_NETWORKS_NO_OPPORTUNISTIC_SUB_AVAILABLE on R.

Bug: 158020761
Test: Build pass

atest TelephonyManagerTest#testUpdateAvailableNetworks
[1/1] android.telephony.cts.TelephonyManagerTest#testUpdateAvailableNetworks: PASSED (630ms)

atest CarrierApiTest#testUpdateAvailableNetworksWithCarrierPrivilege
[1/1] android.carrierapi.cts.CarrierApiTest#testUpdateAvailableNetworksWithCarrierPrivilege: PASSED (27ms)

Change-Id: I71fbafdfb8f70a7cb9e460a757e7c11ae87810ea
2 files changed