Hide "additional services" if there is only a single primary services

There is a case where there is a single primary service (e.g.
a fresh device) and we should hide additional services in that
case.

Test: unit + manual
Bug: 325077523
Change-Id: I9efb785ac3f7a328fdccd138e585f766d46fa282

src/com/android/settings/applications/credentials/CredentialManagerPreferenceController.java

@@ -166,7 +166,7 @@ public class CredentialManagerPreferenceController extends BasePreferenceControl
             return CONDITIONALLY_UNAVAILABLE;
         }
 
-        if (mServices.isEmpty()) {
+        if (!hasNonPrimaryServices()) {
             return CONDITIONALLY_UNAVAILABLE;
         }
 
@@ -428,6 +428,17 @@ public class CredentialManagerPreferenceController extends BasePreferenceControl
         }
     }
 
+    @VisibleForTesting
+    public boolean hasNonPrimaryServices() {
+        for (CredentialProviderInfo availableService : mServices) {
+            if (!availableService.isPrimary()) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
     @Override
     public void displayPreference(PreferenceScreen screen) {
         super.displayPreference(screen);