mash: Move tray accessibility and keyboard to //ash/common

ash/common/keyboard/keyboard_ui.h

Index: ash/common/keyboard/keyboard_ui.h
diff --git a/ash/keyboard/keyboard_ui.h b/ash/common/keyboard/keyboard_ui.h
similarity index 89%
rename from ash/keyboard/keyboard_ui.h
rename to ash/common/keyboard/keyboard_ui.h
index 71a28cb3d1f2a254f3f82b06b01c9a45fb141a86..82a2c6421c07bb51256284a1650b243a983022e9 100644
--- a/ash/keyboard/keyboard_ui.h
+++ b/ash/common/keyboard/keyboard_ui.h
@@ -2,8 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef ASH_KEYBOARD_KEYBOARD_UI_H_
-#define ASH_KEYBOARD_KEYBOARD_UI_H_
+#ifndef ASH_COMMON_KEYBOARD_KEYBOARD_UI_H_
+#define ASH_COMMON_KEYBOARD_KEYBOARD_UI_H_
 
 #include <memory>
 
@@ -46,4 +46,4 @@ class ASH_EXPORT KeyboardUI {
 
 }  // namespace ash
 
-#endif  // ASH_KEYBOARD_KEYBOARD_UI_H_
+#endif  // ASH_COMMON_KEYBOARD_KEYBOARD_UI_H_