[Touchless][ExploreSites]: Change icon squares to circles

Bug: 960890
Change-Id: I31b96c399f4a06b081172d3a2afd2dfcba2632d5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1601346
Commit-Queue: Cathy Li <chili@chromium.org>
Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#658408}

chrome/android/touchless/java/res/drawable/ic_apps_black_24dp.xml

-<vector xmlns:android="http://schemas.android.com/apk/res/android"
-        xmlns:tools="http://schemas.android.com/tools"
-        tools:targetApi="21"
-        android:width="24dp"
-        android:height="24dp"
-        android:viewportWidth="24.0"
-        android:viewportHeight="24.0">
-    <path
-        android:fillColor="#4267B2"
-        android:pathData="M4,8h4L8,4L4,4v4zM10,20h4v-4h-4v4zM4,20h4v-4L4,16v4zM4,14h4v-4L4,10v4zM10,14h4v-4h-4v4zM16,4v4h4L20,4h-4zM10,8h4L14,4h-4v4zM16,14h4v-4h-4v4zM16,20h4v-4h-4v4z"/>
-</vector>

chrome/android/touchless/java/res/drawable/ic_apps_blue_24dp.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2019 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. -->
+
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        xmlns:tools="http://schemas.android.com/tools"
+        tools:targetApi="21"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="@color/default_icon_color_blue"
+        android:pathData="M6,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,20c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM6,20c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM6,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM12,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM16,6c0,1.1 0.9,2 2,2s2,-0.9 2,-2 -0.9,-2 -2,-2 -2,0.9 -2,2zM12,8c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM18,14c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2zM18,20c1.1,0 2,-0.9 2,-2s-0.9,-2 -2,-2 -2,0.9 -2,2 0.9,2 2,2z"/>
+</vector>

chrome/android/touchless/java/src/org/chromium/chrome/browser/touchless/SiteSuggestionsAdapter.java

@@ -166,7 +166,7 @@ class SiteSuggestionsAdapter extends ForwardingListObservable<PropertyKey>
 
         if (holder.getItemViewType() == ViewType.ALL_APPS_TYPE) {
             tile.setIconDrawable(VectorDrawableCompat.create(tile.getResources(),
-                    R.drawable.ic_apps_black_24dp, tile.getContext().getTheme()));
+                    R.drawable.ic_apps_blue_24dp, tile.getContext().getTheme()));
             // If explore sites, clicks navigate to the Explore URL.
             tile.setOnClickListener(
                     (view)