Unique display name util uses available, rather than active, subscriptions.

Test: atest -c SettingsUnitTest
Bug: 178560175
Change-Id: Ief035cf3de3ac03fe348095f36bfb78a41f93d2c
(cherry picked from commit c14e3b3115)
Merged-In: Ief035cf3de3ac03fe348095f36bfb78a41f93d2c

src/com/android/settings/network/ProviderModelSlice.java

@@ -182,8 +182,9 @@ public class ProviderModelSlice extends WifiSlice {
         }
         final int defaultSubId = subscriptionManager.getDefaultDataSubscriptionId();
         log("defaultSubId:" + defaultSubId);
-        if (!SubscriptionManager.isUsableSubscriptionId(defaultSubId)) {
-            return; // No subscription - do nothing.
+
+        if (!defaultSubscriptionIsUsable(defaultSubId)) {
+            return;
         }
 
         boolean isToggleAction = intent.hasExtra(EXTRA_TOGGLE_STATE);
@@ -258,4 +259,12 @@ public class ProviderModelSlice extends WifiSlice {
                 .setTitle(mContext.getText(R.string.ethernet))
                 .setSubtitle(mContext.getText(R.string.cannot_switch_networks_while_connected));
     }
+
+    /**
+     * Wrap the subscriptionManager call for test mocking.
+     */
+    @VisibleForTesting
+    protected boolean defaultSubscriptionIsUsable(int defaultSubId) {
+        return SubscriptionManager.isUsableSubscriptionId(defaultSubId);
+    }
 }