Refresh layout for dialpad

- update some assets for new holo UI
- Use system's TableLayout
-- ButtonGridLayout is hard to control from xml
-- Tried to use new system GridLayout, but it looks
   TableLayout was suitable for this purpose
- remove background drawables
- remove codes dynamically setting background for digit field

Change-Id: I75853eca37ffa3a554a407b181dedc9b92bcf9e7
diff --git a/res/values/styles.xml b/res/values/styles.xml
index 6a79817..d89ebcf 100644
--- a/res/values/styles.xml
+++ b/res/values/styles.xml
@@ -288,18 +288,23 @@
         <item name="android:paddingRight">20dip</item>
     </style>
 
-    <style name="DialtactsDigitsTextAppearance"
-           parent="@android:attr/textAppearanceMedium">
+    <style name="DialtactsDigitsTextAppearance">
         <item name="android:maxLines">1</item>
         <item name="android:scrollHorizontally">true</item>
         <item name="android:textSize">@dimen/dialpad_digits_text_size</item>
         <item name="android:freezesText">true</item>
-        <item name="android:textColor">@color/dialer_button_text</item>
-        <item name="android:background">@drawable/btn_dial_textfield</item>
         <item name="android:focusableInTouchMode">true</item>
         <item name="android:editable">true</item>
         <item name="android:cursorVisible">false</item>
         <item name="android:layout_weight">0</item>
     </style>
 
+    <style name="DialtactsDialpadButtonStyle">
+        <item name="android:layout_width">0dip</item>
+        <item name="android:layout_height">@dimen/dialpad_button_height</item>
+        <item name="android:layout_weight">1</item>
+        <item name="android:background">@null</item>
+        <item name="android:soundEffectsEnabled">false</item>
+        <item name="android:contentDescription">@string/description_image_button_one</item>
+    </style>
 </resources>