Fix date margin

- Use a specific margin for date in normal mode.
Bug: 5685616

Change-Id: I38843b66e8e2cbc077f2d7421a4e1cb86b274dc5

res/layout/message_list_item_normal.xml

@@ -80,8 +80,7 @@
             android:layout_width="80dip"
             android:layout_height="wrap_content"
             android:layout_alignParentRight="true"
-            android:layout_above="@+id/star"
-            android:layout_marginBottom="@dimen/message_list_icon_padding_compensation"
+            android:layout_marginTop="@dimen/date_margin_top"
             android:orientation="horizontal"
             >
             <!-- reserve enough vertical space for two icons -->

res/values/dimensions.xml

@@ -77,4 +77,5 @@
     <dimen name="replystate_margin_top">10sp</dimen>
     <dimen name="checkmark_margin_top">3sp</dimen>
     <dimen name="star_margin_top">28sp</dimen>
+    <dimen name="date_margin_top">9sp</dimen>
 </resources>