Fix billing address dropdown error marker overlaps the downward triangle

BUG=679758

Review-Url: https://codereview.chromium.org/2620143002
Cr-Commit-Position: refs/heads/master@{#442909}

chrome/android/java/res/layout/multiline_spinner_item.xml

@@ -10,5 +10,4 @@
     android:singleLine="false"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:paddingEnd="24dp"
     android:textAlignment="inherit" />

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

@@ -6,6 +6,7 @@ package org.chromium.chrome.browser.payments.ui;
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.graphics.Rect;
 import android.graphics.Typeface;
 import android.view.View;
 import android.view.ViewGroup;
@@ -73,6 +74,19 @@ public class BillingAddressAdapter<T> extends ArrayAdapter<T> {
         return count > 0 ? count - 1 : count;
     }
 
+    @Override
+    public View getView(int position, View convertView, ViewGroup parent) {
+        View view = super.getView(position, convertView, parent);
+
+        // Add the left and right padding of the parent's background to the selected item view to
+        // avoid overlaping the downward triangle.
+        Rect rect = new Rect();
+        parent.getBackground().getPadding(rect);
+        view.setPadding(view.getPaddingLeft() + rect.left, view.getPaddingTop(),
+                view.getPaddingRight() + rect.right, view.getPaddingBottom());
+        return view;
+    }
+
     @Override
     public View getDropDownView(int position, View convertView, ViewGroup parent) {
         TextView textView = convertView == null