Mock method to avoid exception.

- TelephonyManager#getVoiceNetworkType()

Flag: EXEMPT bug fix
Fix: 383209846
Test: atest pass
Change-Id: Iedb971b58cea6ff5844eb4268a53b0d8f0d41062

tests/unit/src/com/android/settings/deviceinfo/simstatus/SimStatusDialogControllerTest.java

@@ -116,6 +116,7 @@ public class SimStatusDialogControllerTest {
         doReturn(mTelephonyManager).when(mTelephonyManager).createForSubscriptionId(
                 anyInt());
         doReturn(2).when(mTelephonyManager).getCardIdForDefaultEuicc();
+        doReturn(TelephonyManager.NETWORK_TYPE_LTE).when(mTelephonyManager).getVoiceNetworkType();
         doReturn(TelephonyManager.NETWORK_TYPE_LTE).when(mTelephonyManager).getDataNetworkType();
 
         mUpdatePhoneNumberCount = new AtomicInteger();