Clean up Keyboard and KeyboardView theme

Change-Id: I3f49f400b3857d34e1f2a7727a17c768787fe045
diff --git a/java/res/values/themes-common.xml b/java/res/values/themes-common.xml
index b139110..5c66bd2 100644
--- a/java/res/values/themes-common.xml
+++ b/java/res/values/themes-common.xml
@@ -22,14 +22,20 @@
     <style name="KeyboardIcons" />
     <!-- Default theme values -->
     <style name="Keyboard">
-        <item name="touchPositionCorrectionData">@array/touch_position_correction_data_default</item>
         <item name="rowHeight">25%p</item>
-        <item name="moreKeysTemplate">@xml/kbd_more_keys_keyboard_template</item>
+        <item name="horizontalGap">@fraction/config_key_horizontal_gap_holo</item>
+        <item name="verticalGap">@fraction/config_key_vertical_gap_holo</item>
+        <item name="touchPositionCorrectionData">@array/touch_position_correction_data_holo</item>
+        <item name="keyboardTopPadding">@fraction/config_keyboard_top_padding_holo</item>
+        <item name="keyboardBottomPadding">@fraction/config_keyboard_bottom_padding_holo</item>
         <item name="keyboardLeftPadding">@fraction/config_keyboard_left_padding</item>
         <item name="keyboardRightPadding">@fraction/config_keyboard_right_padding</item>
+        <item name="moreKeysTemplate">@xml/kbd_more_keys_keyboard_template</item>
         <item name="maxMoreKeysColumn">@integer/config_max_more_keys_column</item>
     </style>
     <style name="KeyboardView">
+        <!-- This keyBackground is needed to run unit tests based on {@link InputTestBase}. -->
+        <!-- TODO: Apply default {@link KeyboardTheme} to {@link InputTestBase} and remove this. -->
         <item name="keyBackground">@drawable/btn_keyboard_key_klp</item>
         <item name="keyLetterSize">@fraction/config_key_letter_ratio</item>
         <item name="keyLargeLetterRatio">@fraction/config_key_large_letter_ratio</item>
@@ -39,6 +45,8 @@
         <item name="keyHintLabelRatio">@fraction/config_key_hint_label_ratio</item>
         <item name="keyShiftedLetterHintRatio">@fraction/config_key_shifted_letter_hint_ratio</item>
         <item name="keyTypeface">normal</item>
+        <!-- A negative value to disable key text shadow layer. -->
+        <item name="keyTextShadowRadius">-1.0</item>
         <item name="keyHintLetterPadding">@dimen/config_key_hint_letter_padding</item>
         <item name="keyPopupHintLetterPadding">@dimen/config_key_popup_hint_letter_padding</item>
         <item name="keyShiftedLetterHintPadding">@dimen/config_key_shifted_letter_hint_padding</item>
@@ -110,7 +118,7 @@
     <style name="MoreKeysKeyboard" />
     <style
         name="MoreKeysKeyboardView"
-        parent="MainKeyboardView" />
+        parent="KeyboardView" />
     <style name="MoreKeysKeyboardContainer" />
     <style name="SuggestionStripView" />
     <style name="SuggestionWord">