Fix bug #16800261 Settings app: Device administrator screen padding issue

- remove listPreferredItemPaddingStart / listPreferredItemPaddingEnd from
the ListView and add it to the list item
- add missing 8dp end padding for the icon

Change-Id: I78696e5ee8e243771d23c86fa178de2f60b5c88d

res/layout/device_admin_item.xml

@@ -20,6 +20,8 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
+    android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+    android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
     android:minHeight="?android:attr/listPreferredItemHeight"
     android:orientation="horizontal"
     android:gravity="center_vertical" >
@@ -35,6 +37,7 @@
             android:layout_width="@android:dimen/app_icon_size"
             android:layout_height="@android:dimen/app_icon_size"
             android:layout_gravity="center_vertical"
+            android:layout_marginEnd="8dip"
             android:contentDescription="@null" />
 
     </LinearLayout>

res/layout/device_admin_settings.xml

@@ -27,8 +27,6 @@
         <ListView android:id="@android:id/list"
                 android:layout_width="match_parent" 
                 android:layout_height="match_parent"
-                android:paddingStart="?android:attr/listPreferredItemPaddingStart"
-                android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
                 android:scrollbarStyle="outsideOverlay"
                 android:drawSelectorOnTop="false"
                 android:fastScrollEnabled="true" />