[cr140][Android] Update btn_right and btn_back to newer asset

Chromium change:
https://source.chromium.org/chromium/chromium/src/+/f5f7db8839213f6a812ba2fb5972547225d0347b

	Update btn_right and btn_back to newer asset

	Replaces btn_right.png and btn_left.png with a newer material vector drawables.

	Bug: 425739282
	Change-Id: Ic1c50a79c7c1eedb7d69e727bbc2463b1bc94cc7
	Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6692114

android/java/res/drawable/arrow_back_24px.xml

@@ -0,0 +1,14 @@
+<!-- Copyright (c) 2025 The Brave Authors. All rights reserved.
+     This Source Code Form is subject to the terms of the Mozilla Public
+     License, v. 2.0. If a copy of the MPL was not distributed with this file,
+     You can obtain one at https://mozilla.org/MPL/2.0/. -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M8.684,12.566a0.8,0.8 0,0 1,0 -1.132l5.5,-5.5a0.8,0.8 0,1 1,1.132 1.132L10.38,12l4.935,4.934a0.8,0.8 0,1 1,-1.132 1.132z"
+      android:fillColor="#62757E"
+      android:fillType="evenOdd"/>
+</vector>

android/java/res/drawable/arrow_forward_24px.xml

@@ -0,0 +1,14 @@
+<!-- Copyright (c) 2025 The Brave Authors. All rights reserved.
+     This Source Code Form is subject to the terms of the Mozilla Public
+     License, v. 2.0. If a copy of the MPL was not distributed with this file,
+     You can obtain one at https://mozilla.org/MPL/2.0/. -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M16.299,12.833H4.833a0.833,0.833 0,0 1,0 -1.666H16.3l-5.656,-5.221a0.833,0.833 0,1 1,1.13 -1.225l6.78,6.258a1.39,1.39 0,0 1,0 2.042l-6.78,6.258a0.833,0.833 0,1 1,-1.13 -1.225z"
+      android:fillColor="#62757E"
+      android:fillType="evenOdd"/>
+</vector>

android/java/res/drawable/btn_right_tablet.xml

@@ -0,0 +1,14 @@
+<!-- Copyright (c) 2025 The Brave Authors. All rights reserved.
+     This Source Code Form is subject to the terms of the Mozilla Public
+     License, v. 2.0. If a copy of the MPL was not distributed with this file,
+     You can obtain one at https://mozilla.org/MPL/2.0/. -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+  <path
+      android:pathData="M15.316,11.434a0.8,0.8 0,0 1,0 1.132l-5.5,5.5a0.8,0.8 0,1 1,-1.132 -1.132L13.62,12 8.684,7.066a0.8,0.8 0,1 1,1.132 -1.132z"
+      android:fillColor="#62757E"
+      android:fillType="evenOdd"/>
+</vector>