Specify keyboard metrics with physical unit "inch" (DO NOT MERGE)

This change also introduces the key background drawables which has no
fixed bottom padding.  Instead of relying on bottom padding in
drawable, this change also specifies Keyboard.verticalGap with
physical unit.  Other keyboard related length, distance and size are
also specified by physical unit.

Bug: 3066107

Change-Id: I44f3b2eef8086d6e0b0db53d38f08487549060c6

java/res/layout/input_gingerbread.xml

@@ -25,6 +25,7 @@
         android:layout_alignParentBottom="true"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:paddingBottom="@dimen/keyboard_bottom_padding"
         android:background="@drawable/keyboard_dark_background"
         android:textStyle="bold"
 

java/res/values-land/dimens.xml

@@ -19,13 +19,17 @@
 -->
 
 <resources>
-    <dimen name="key_height">47dip</dimen>
+    <!-- key_height + key_bottom_gap = popup_key_height -->
+    <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_bottom_padding">0.0in</dimen>
     <dimen name="candidate_strip_height">38dip</dimen>
     <dimen name="candidate_strip_fading_edge_length">63dip</dimen>
     <dimen name="spacebar_vertical_correction">2dip</dimen>
     <!-- Amount of allowance for selecting keys in a mini popup keyboard by sliding finger. -->
-    <!-- key_height x 1.7 -->
-    <dimen name="mini_keyboard_slide_allowance">79.9dip</dimen>
-    <!-- -key_height x 1.0 -->
-    <dimen name="mini_keyboard_vertical_correction">-47dip</dimen>
+    <!-- popup_key_height x 1.7 -->
+    <dimen name="mini_keyboard_slide_allowance">0.459in</dimen>
+    <!-- popup_key_height x 1.0 -->
+    <dimen name="mini_keyboard_vertical_correction">-0.270in</dimen>
 </resources>

java/res/values/dimens.xml

@@ -19,7 +19,11 @@
 -->
 
 <resources>
-    <dimen name="key_height">54dip</dimen>
+    <!-- key_height + key_bottom_gap = popup_key_height -->
+    <dimen name="key_height">0.290in</dimen>
+    <dimen name="key_bottom_gap">0.035in</dimen>
+    <dimen name="popup_key_height">0.325in</dimen>
+    <dimen name="keyboard_bottom_padding">0.06in</dimen>
     <dimen name="bubble_pointer_offset">22dip</dimen>
     <dimen name="candidate_strip_height">42dip</dimen>
     <dimen name="candidate_strip_fading_edge_length">63dip</dimen>
@@ -27,18 +31,20 @@
     <!-- If the screen height in landscape is larger than the below value, then the keyboard
          will not go into extract (fullscreen) mode. -->
     <dimen name="max_height_for_fullscreen">2.5in</dimen>
-    <dimen name="key_text_size">22sp</dimen>
-    <dimen name="key_label_text_size">14sp</dimen>
-    <dimen name="key_preview_offset">0dip</dimen>
-    <dimen name="key_preview_height">80dip</dimen>
+    <dimen name="key_text_size">0.13in</dimen>
+    <dimen name="key_label_text_size">0.083in</dimen>
+    <dimen name="key_preview_text_size_large">0.236in</dimen>
+    <dimen name="key_preview_offset">0.000in</dimen>
+    <!-- key_height x 1.6 -->
+    <dimen name="key_preview_height">0.464in</dimen>
     <!-- Amount of allowance for selecting keys in a mini popup keyboard by sliding finger. -->
-    <!-- key_height x 1.7 -->
-    <dimen name="mini_keyboard_slide_allowance">91.8dip</dimen>
-    <!-- -key_height x 1.0 -->
-    <dimen name="mini_keyboard_vertical_correction">-54dip</dimen>
+    <!-- popup_key_height x 1.7 -->
+    <dimen name="mini_keyboard_slide_allowance">0.553in</dimen>
+    <!-- popup_key_height x 1.0 -->
+    <dimen name="mini_keyboard_vertical_correction">-0.325in</dimen>
     <dimen name="key_hysteresis_distance">0.05in</dimen>
     <!-- We use "inch", not "dip" because this value tries dealing with physical distance related
          to user's finger. -->
-    <dimen name="keyboard_vertical_correction">-0.06in</dimen>
+    <dimen name="keyboard_vertical_correction">-0.05in</dimen>
     <dimen name="candidate_min_touchable_width">0.3in</dimen>
 </resources>

java/res/xml-da/kbd_qwerty.xml

@@ -28,10 +28,12 @@
     xmlns:android="http://schemas.android.com/apk/res/android"
     android:keyWidth="9.09%p"
     android:horizontalGap="0px"
-    android:verticalGap="0px"
+    android:verticalGap="@dimen/key_bottom_gap"
     android:keyHeight="@dimen/key_height"
 >
-    <Row>
+    <Row
+        android:rowEdgeFlags="top"
+    >
         <Key
             android:keyLabel="q"
             android:popupKeyboard="@xml/kbd_popup_template"