Fix up Network and Internet Slice

- Fix pref key for Airplane mode
- Return null when no mobile data is available

Test: robotests
Fixes: 130244854
Change-Id: I88806cb9215af159114ac150c20cdb8fb413befe

res/xml/network_and_internet.xml

@@ -64,7 +64,7 @@
         settings:useAdminDisabledSummary="true" />
 
     <com.android.settingslib.RestrictedSwitchPreference
-        android:key="airplane_mode"
+        android:key="airplane_mode_old"
         android:title="@string/airplane_mode"
         android:icon="@drawable/ic_airplanemode_active"
         android:disableDependentsState="true"

res/xml/network_and_internet_v2.xml

@@ -52,7 +52,7 @@
         settings:useAdminDisabledSummary="true" />
 
     <com.android.settingslib.RestrictedSwitchPreference
-        android:key="toggle_airplane"
+        android:key="airplane_mode"
         android:title="@string/airplane_mode"
         android:icon="@drawable/ic_airplanemode_active"
         android:disableDependentsState="true"

src/com/android/settings/network/telephony/MobileDataSlice.java

@@ -46,6 +46,7 @@ import com.android.settings.slices.SliceBackgroundWorker;
 import com.google.common.annotations.VisibleForTesting;
 
 import java.io.IOException;
+import java.util.List;
 
 /**
  * Custom {@link Slice} for Mobile Data.
@@ -71,6 +72,11 @@ public class MobileDataSlice implements CustomSliceable {
 
     @Override
     public Slice getSlice() {
+        // Mobile data not available, thus return no Slice.
+        if (!isMobileDataAvailable()) {
+            return null;
+        }
+
         final IconCompat icon = IconCompat.createWithResource(mContext,
                 R.drawable.ic_network_cell);
         final String title = mContext.getText(R.string.mobile_data_settings_title).toString();
@@ -178,6 +184,16 @@ public class MobileDataSlice implements CustomSliceable {
                 intent, 0 /* flags */);
     }
 
+    /**
+     * @return {@code true} when mobile data is not supported by the current device.
+     */
+    private boolean isMobileDataAvailable() {
+        final List<SubscriptionInfo> subInfoList =
+                mSubscriptionManager.getSelectableSubscriptionInfoList();
+
+        return !(subInfoList == null || subInfoList.isEmpty());
+    }
+
     @VisibleForTesting
     boolean isAirplaneModeEnabled() {
         // Generic key since we only want the method check - no UI.

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

@@ -49,6 +49,8 @@ import org.mockito.MockitoAnnotations;
 import org.robolectric.RobolectricTestRunner;
 import org.robolectric.RuntimeEnvironment;
 
+import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 @RunWith(RobolectricTestRunner.class)
@@ -76,6 +78,9 @@ public class MobileDataSliceTest {
         doReturn(mTelephonyManager).when(mTelephonyManager).createForSubscriptionId(SUB_ID);
         doReturn(mSubscriptionInfo).when(mSubscriptionManager).getDefaultDataSubscriptionInfo();
         doReturn(SUB_ID).when(mSubscriptionInfo).getSubscriptionId();
+        doReturn(new ArrayList<>(Arrays.asList(mSubscriptionInfo)))
+                .when(mSubscriptionManager).getSelectableSubscriptionInfoList();
+
 
         // Set-up specs for SliceMetadata.
         SliceProvider.setSpecs(SliceLiveData.SUPPORTED_SPECS);
@@ -164,6 +169,24 @@ public class MobileDataSliceTest {
         assertThat(isMobileDataEnabled).isEqualTo(seed);
     }
 
+    @Test
+    public void isMobileDataAvailable_noSubscriptions_returnsNull() {
+        doReturn(new ArrayList<>()).when(mSubscriptionManager).getSelectableSubscriptionInfoList();
+
+        final Slice slice = mMobileDataSlice.getSlice();
+
+        assertThat(slice).isNull();
+    }
+
+    @Test
+    public void isMobileDataAvailable_nullSubscriptions_returnsNull() {
+        doReturn(null).when(mSubscriptionManager).getSelectableSubscriptionInfoList();
+
+        final Slice slice = mMobileDataSlice.getSlice();
+
+        assertThat(slice).isNull();
+    }
+
     @Test
     public void airplaneModeEnabled_slicePrimaryActionIsEmpty() {
         doReturn(true).when(mMobileDataSlice).isAirplaneModeEnabled();