Fix paddings for user switch and status bar icons.

Bug: 15540707
Change-Id: If7288d032b9625e0fbb5b657afcf680d178e63ee
(cherry picked from commit 5d545e7c89231ac80ab2b666bd83f63bcf54f78f)
diff --git a/packages/SystemUI/res/values/dimens.xml b/packages/SystemUI/res/values/dimens.xml
index 7ed3e29..8b8c126 100644
--- a/packages/SystemUI/res/values/dimens.xml
+++ b/packages/SystemUI/res/values/dimens.xml
@@ -330,4 +330,6 @@
          phone hints. -->
     <dimen name="edge_tap_area_width">48dp</dimen>
 
+    <!-- end margin for multi user switch in expanded quick settings -->
+    <dimen name="multi_user_switch_expanded_margin">8dp</dimen>
 </resources>