Make Settings app aware of layout direction

- see bug #5429822 UI should be mirrored for RTL locales (Arabic, Hebrew, farsi)

Change-Id: I696c0f66a16640af767da3c05b5d300fd2284ecb
diff --git a/res/layout/data_usage_header.xml b/res/layout/data_usage_header.xml
index 619956d..0a8006b 100644
--- a/res/layout/data_usage_header.xml
+++ b/res/layout/data_usage_header.xml
@@ -41,8 +41,8 @@
         android:id="@+id/usage_summary"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
-        android:paddingRight="?android:attr/listPreferredItemPaddingRight"
+        android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+        android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
         android:paddingTop="8dip"
         android:paddingBottom="8dip"
         android:textAppearance="?android:attr/textAppearanceSmall" />
@@ -52,8 +52,8 @@
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:visibility="gone"
-        android:paddingLeft="?android:attr/listPreferredItemPaddingLeft"
-        android:paddingRight="?android:attr/listPreferredItemPaddingRight"
+        android:paddingStart="?android:attr/listPreferredItemPaddingStart"
+        android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
         android:paddingBottom="8dip"
         android:text="@string/data_usage_empty"
         android:textAppearance="?android:attr/textAppearanceSmall" />