Add bluetooth device type icons on MD system tray.

ash/resources/vector_icons/system_menu_headset.icon

Index: ash/resources/vector_icons/system_menu_headset.icon
diff --git a/ash/resources/vector_icons/system_menu_headset.icon b/ash/resources/vector_icons/system_menu_headset.icon
new file mode 100644
index 0000000000000000000000000000000000000000..67cc0dcf27706ec77b5ba0d0b35bc8d33f0c4d2b
--- /dev/null
+++ b/ash/resources/vector_icons/system_menu_headset.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, 40,
+MOVE_TO, 5, 19.16f,
+R_V_LINE_TO, 11.79f,
+CUBIC_TO, 5, 33.74f, 7.23f, 36, 10, 36,
+R_H_LINE_TO, 5,
+V_LINE_TO, 23,
+H_LINE_TO, 8,
+R_V_LINE_TO, -3.84f,
+CUBIC_TO, 8, 12.64f, 13.55f, 7, 20, 7,
+R_CUBIC_TO, 6.45f, 0, 12, 5.64f, 12, 12.16f,
+V_LINE_TO, 23,
+R_H_LINE_TO, -7,
+R_V_LINE_TO, 13,
+R_H_LINE_TO, 5,
+R_CUBIC_TO, 2.77f, 0, 5, -2.26f, 5, -5.05f,
+R_V_LINE_TO, -11.79f,
+CUBIC_TO, 35, 10.79f, 28.28f, 4, 20, 4,
+CUBIC_TO, 11.72f, 4, 5, 10.79f, 5, 19.16f,
+CLOSE,
+END