[Autofill Assistant] Changes icon for feedback.

The new icon is: https://icons.googleplex.com/#icon=ic_bug_report

Bug: 806868
Change-Id: I093adad3a533e1cf4236c74fa589f24ecb725686
Reviewed-on: https://chromium-review.googlesource.com/c/1329796
Commit-Queue: Lukasz Suder <lsuder@chromium.org>
Reviewed-by: Mathias Carlen <mcarlen@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#607549}

chrome/android/java/res_autofill_assistant/drawable/ic_bug_report_24dp.xml

+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2018 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"
+    android:viewportHeight="24">
+  <path
+          android:pathData="M20,8h-2.81c-0.45,-0.78 -1.07,-1.45 -1.82,-1.96L17,4.41 15.59,3l-2.17,2.17C12.96,5.06 12.49,5 12,5c-0.49,0 -0.96,0.06 -1.41,0.17L8.41,3 7,4.41l1.62,1.63C7.88,6.55 7.26,7.22 6.81,8L4,8v2h2.09c-0.05,0.33 -0.09,0.66 -0.09,1v1L4,12v2h2v1c0,0.34 0.04,0.67 0.09,1L4,16v2h2.81c1.04,1.79 2.97,3 5.19,3s4.15,-1.21 5.19,-3L20,18v-2h-2.09c0.05,-0.33 0.09,-0.66 0.09,-1v-1h2v-2h-2v-1c0,-0.34 -0.04,-0.67 -0.09,-1L20,10L20,8zM14,16h-4v-2h4v2zM14,12h-4v-2h4v2z"
+          android:fillColor="#000000"/>
+</vector>

chrome/android/java/res_autofill_assistant/layout/autofill_assistant_sheet.xml

@@ -70,7 +70,7 @@
                 android:layout_width="24dp"
                 android:layout_height="24dp"
                 android:layout_marginEnd="12dp"
-                android:src="@drawable/help_outline"
+                android:src="@drawable/ic_bug_report_24dp"
                 android:tint="@color/light_icon_color"
                 android:background="?attr/selectableItemBackground"
                 android:contentDescription="@string/menu_send_feedback" />