Fix ViLTE is not available when WiFi Calling is disabled

Bug: 141831293
Test: 1. Set carrier config carrier_wfc_ims_available_bool to false,
then verify Wi-Fi calling option is not shown.
      2. Set carrier config carrier_vt_available_bool to false, then
      verify video calling option is not shown.
      3. Set both carrier_wfc_ims_available_bool and
      carrier_vt_available_bool to false, then verify calling category
      is not shown.

Change-Id: Ibec13fbeb5acf1d62342286687b2ba969beb4e14

tests/robotests/src/com/android/settings/network/telephony/VideoCallingPreferenceControllerTest.java

@@ -27,6 +27,7 @@ import android.telephony.CarrierConfigManager;
 import android.telephony.TelephonyManager;
 import android.telephony.ims.feature.ImsFeature;
 
+import androidx.preference.PreferenceScreen;
 import androidx.preference.SwitchPreference;
 
 import com.android.ims.ImsManager;
@@ -49,6 +50,8 @@ public class VideoCallingPreferenceControllerTest {
     private ImsManager mImsManager;
     @Mock
     private CarrierConfigManager mCarrierConfigManager;
+    @Mock
+    private PreferenceScreen mPreferenceScreen;
 
     private VideoCallingPreferenceController mController;
     private PersistableBundle mCarrierConfig;
@@ -125,4 +128,15 @@ public class VideoCallingPreferenceControllerTest {
         assertThat(mPreference.isEnabled()).isTrue();
         assertThat(mPreference.isChecked()).isTrue();
     }
+
+
+    @Test
+    public void displayPreference_notAvailable_setPreferenceInvisible() {
+        doReturn(false).when(mImsManager).isVtEnabledByPlatform();
+
+        mController.displayPreference(mPreferenceScreen);
+
+        assertThat(mPreferenceScreen.isVisible()).isFalse();
+    }
+
 }

tests/robotests/src/com/android/settings/network/telephony/WifiCallingPreferenceControllerTest.java

@@ -64,7 +64,6 @@ public class WifiCallingPreferenceControllerTest {
 
     private WifiCallingPreferenceController mController;
     private Preference mPreference;
-    private PreferenceCategory mPreferenceCategory;
     private Context mContext;
     private PersistableBundle mCarrierConfig;
 
@@ -87,10 +86,6 @@ public class WifiCallingPreferenceControllerTest {
         mCarrierConfig = new PersistableBundle();
         when(mCarrierConfigManager.getConfigForSubId(SUB_ID)).thenReturn(mCarrierConfig);
 
-        mPreferenceCategory = new PreferenceCategory(mContext);
-        when(mPreferenceScreen.findPreference(
-                WifiCallingPreferenceController.KEY_PREFERENCE_CATEGORY)).thenReturn(
-                mPreferenceCategory);
         when(mPreferenceScreen.findPreference(mController.getPreferenceKey())).thenReturn(
                 mPreference);
     }
@@ -164,12 +159,12 @@ public class WifiCallingPreferenceControllerTest {
     }
 
     @Test
-    public void displayPreference_notAvailable_setCategoryInvisible() {
+    public void displayPreference_notAvailable_setPreferenceInvisible() {
         mController.init(SubscriptionManager.INVALID_SUBSCRIPTION_ID);
 
         mController.displayPreference(mPreferenceScreen);
 
-        assertThat(mPreferenceCategory.isVisible()).isFalse();
+        assertThat(mPreferenceScreen.isVisible()).isFalse();
     }
 
     @Test