Add bluetooth device type icons on MD system tray.

ash/resources/vector_icons/system_menu_headset.1x.icon

Index: ash/resources/vector_icons/system_menu_headset.1x.icon
diff --git a/ash/resources/vector_icons/system_menu_headset.1x.icon b/ash/resources/vector_icons/system_menu_headset.1x.icon
new file mode 100644
index 0000000000000000000000000000000000000000..c01f734ba7c488b9f138d92f0884625440a50d25
--- /dev/null
+++ b/ash/resources/vector_icons/system_menu_headset.1x.icon
@@ -0,0 +1,24 @@
+// 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, 20,
+MOVE_TO, 2, 9.58f,
+R_V_LINE_TO, 5.89f,
+CUBIC_TO, 2, 16.87f, 3, 18, 4.5f, 18,
+H_LINE_TO, 7,
+R_V_LINE_TO, -6,
+H_LINE_TO, 4,
+V_LINE_TO, 9.58f,
+CUBIC_TO, 4, 6.32f, 6.78f, 4, 10, 4,
+R_CUBIC_TO, 3.22f, 0, 6, 2.32f, 6, 5.58f,
+V_LINE_TO, 12,
+R_H_LINE_TO, -3,
+R_V_LINE_TO, 6,
+R_H_LINE_TO, 2.5f,
+R_CUBIC_TO, 1.38f, 0, 2.5f, -1.13f, 2.5f, -2.53f,
+V_LINE_TO, 9.58f,
+CUBIC_TO, 18, 5.39f, 14.14f, 2, 10, 2,
+CUBIC_TO, 5.86f, 2, 2, 5.39f, 2, 9.58f,
+CLOSE,
+END