[NTP::Downloads] Replace 36dp file type resources with vector drawables.

chrome/android/java/res/drawable/ic_play_arrow_white.xml

Index: chrome/android/java/res/drawable/ic_play_arrow_white.xml
diff --git a/chrome/android/java/res/drawable/ic_play_arrow_white.xml b/chrome/android/java/res/drawable/ic_play_arrow_white.xml
new file mode 100644
index 0000000000000000000000000000000000000000..5d555f251d80ed9f0b0a3f3362b0c5833944eadb
--- /dev/null
+++ b/chrome/android/java/res/drawable/ic_play_arrow_white.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2017 The Chromium Authors. All rights reserved.
+     Use of this source code is governed by a BSD-style license that can be
+     found in the LICENSE file. -->
+<!-- TODO(https://crbug.com/602627) tools:targetApi added to mute the NewApi lint error. -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        tools:targetApi="21"
+        android:width="48dp"
+        android:height="48dp"
+        android:viewportWidth="48.0"
+        android:viewportHeight="48.0">
+    <path
+        android:pathData="M16,10v28l22,-14z"
+        android:fillColor="#FFFFFF"/>
+</vector>