Get rid of public reference to KeyboardIconsSet.ICON_* constants

As a consequence,
  * Add Key.iconDisabledKey has been introduced and Key.getIcon honors
    the enabled state of the key.
  * The attribute id of disabled icon for shortcut key,
    Keyboard_iconShortcutKeyDisabled, is renamed to
    Keyboard_iconDisbledShortcutKey
  * KeyboardIconsSet has getIconByIconId and getIconByAttrId methods
    instead of getIcon.

Bug: 5778201
Change-Id: Ica93b073b9a04acd18ead7a33b60e3c6d813e7a1
diff --git a/java/res/values/styles.xml b/java/res/values/styles.xml
index d4460c9..c4e39e3 100644
--- a/java/res/values/styles.xml
+++ b/java/res/values/styles.xml
@@ -307,7 +307,7 @@
         <item name="spacebarTextRatio">@fraction/spacebar_text_ratio</item>
         <item name="spacebarTextColor">#FFC0C0C0</item>
         <item name="spacebarTextShadowColor">#80000000</item>
-        </style>
+    </style>
     <style
         name="MiniKeyboard.IceCreamSandwich"
         parent="Keyboard.IceCreamSandwich"