Username in nav drawer centrally aligned commons-app#1806 (commons-app#1817)

Author: VaishSiddharth

app/src/main/res/layout/drawer_header.xml

@@ -25,7 +25,7 @@
         android:textColor="@color/item_white_background"
         android:textSize="@dimen/subheading_text_size"
         android:layout_below="@+id/pictureOfTheDay"
-        android:layout_marginLeft="@dimen/activity_margin_horizontal"
+        android:layout_centerHorizontal="true"
         android:paddingBottom="@dimen/small_gap"/>
 
     <ImageView