[Payments] Style "ADD ADDRESS" even if it is the only item in the billing address dropdown

chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java

Index: chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java
diff --git a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java
index 927c3f6686a89f574711dad2cf57fdeaae84989b..51c340dd06c0120583bd01a53d36cf73b0afe85c 100644
--- a/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java
+++ b/chrome/android/java/src/org/chromium/chrome/browser/payments/ui/BillingAddressAdapter.java
@@ -95,7 +95,10 @@ public class BillingAddressAdapter<T> extends DropdownFieldAdapter<T> {
                             R.dimen.payments_section_small_spacing),
                     ApiCompatibilityUtils.getPaddingEnd(convertView),
                     convertView.getPaddingBottom());
-        } else if (position == getCount() - 1) {
+        }
+
+        // The last item is "ADD ADDRESS".
+        if (position == getCount() - 1) {
             // Add a "+" icon and a blue tint to the last element.
             Resources resources = getContext().getResources();
             if (textView == null) {