Remove advanced category if no preference

Test: In debug mode, turn off all the configs for advanced category

Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>
Change-Id: I52ea0905b9d4f03a57b4849e5b575bc5e508dd2d

src/com/android/messaging/ui/appsettings/PerSubscriptionSettingsActivity.java

@@ -190,6 +190,10 @@ public class PerSubscriptionSettingsActivity extends BugleActionBarActivity {
                     deliveryReportsPreference.setEnabled(false);
                 }
             }
+
+            if (advancedCategory.getPreferenceCount() == 0) {
+                getPreferenceScreen().removePreference(advancedCategory);
+            }
         }
 
         private boolean isCellBroadcastAppLinkEnabled() {