Support keyboardHeight and maxKeyboardHeight to Keyboard XML

This change introduces,
- new attribute keyboardHeight to specify default keyboard height.
- new attribute maxKeyboardHeight to specify maximum keyboard height,
  usually specified by percentage to the screen height.
- keyHeight attribute is obsoleted
- new attribute rowHeight to specify a row height, can be specifed as
  percentage of the keyboard height. And verticalGap is included to
  the row height (row height = key height + vertical gap).

Change-Id: I48a2f2661e8a91a998503a847437c1baf1de9b9c
diff --git a/java/res/values-land/dimens.xml b/java/res/values-land/dimens.xml
index f7fc4b1..7df124b 100644
--- a/java/res/values-land/dimens.xml
+++ b/java/res/values-land/dimens.xml
@@ -19,8 +19,10 @@
 -->
 
 <resources>
+    <!-- keyboardHeight = key_height*4 + key_bottom_gap*3 -->
+    <dimen name="keyboardHeight">1.060in</dimen>
     <!-- key_height + key_bottom_gap = popup_key_height -->
-    <dimen name="key_height">0.250in</dimen>
+<!--    <dimen name="key_height">0.250in</dimen>-->
     <dimen name="key_bottom_gap">0.020in</dimen>
     <dimen name="popup_key_height">0.270in</dimen>
     <dimen name="keyboard_top_padding">0.0in</dimen>