Vectorize help icon in Ash system menu for MD

ash/resources/vector_icons/system_menu_help.icon

+// Copyright 2016 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.
+
+CANVAS_DIMENSIONS, 40,
+MOVE_TO, 20, 4,
+CUBIC_TO, 11.17f, 4, 4, 11.17f, 4, 20,
+R_CUBIC_TO, 0, 8.83f, 7.17f, 16, 16, 16,
+R_CUBIC_TO, 8.83f, 0, 16, -7.17f, 16, -16,
+CUBIC_TO_SHORTHAND, 28.83f, 4, 20, 4,
+CLOSE,
+R_MOVE_TO, 1.6f, 27.2f,
+R_H_LINE_TO, -3.2f,
+V_LINE_TO, 28,
+R_H_LINE_TO, 3.2f,
+R_V_LINE_TO, 3.2f,
+CLOSE,
+R_MOVE_TO, 3.31f, -12.4f,
+R_LINE_TO, -1.44f, 1.47f,
+CUBIC_TO, 22.32f, 21.44f, 21.6f, 22.4f, 21.6f, 24.8f,
+R_H_LINE_TO, -3.2f,
+V_LINE_TO, 24,
+R_CUBIC_TO, 0, -1.76f, 0.72f, -3.36f, 1.87f, -4.53f,
+R_LINE_TO, 1.98f, -2.02f,
+R_CUBIC_TO, 0.59f, -0.58f, 0.94f, -1.38f, 0.94f, -2.26f,
+R_CUBIC_TO, 0, -1.76f, -1.44f, -3.2f, -3.2f, -3.2f,
+R_CUBIC_TO, -1.76f, 0, -3.2f, 1.44f, -3.2f, 3.2f,
+R_H_LINE_TO, -3.2f,
+R_CUBIC_TO, 0, -3.54f, 2.86f, -6.4f, 6.4f, -6.4f,
+R_CUBIC_TO, 3.54f, 0, 6.4f, 2.86f, 6.4f, 6.4f,
+R_CUBIC_TO, 0, 1.41f, -0.58f, 2.69f, -1.49f, 3.6f,
+CLOSE,
+END